Save
Upgrade to remove ads
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account. Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Science Benchmark 1

QuestionAnswer
What is a testable question? A question that can be answered by collecting evidence through an investigation.
Which question is testable: “Which flower is prettiest?” or “Does the amount of water affect plant growth?”? Does the amount of water affect plant growth?
What is a hypothesis? A prediction that can be tested.
Students test whether a higher ramp makes a toy car travel farther. What is a possible if-then hypothesis? If the ramp is higher, then the toy car will travel farther.
What is an independent variable? The factor an investigator deliberately changes.
What is a dependent variable? The factor an investigator measures or observes.
What are constants in an experiment? Conditions kept the same to make the test fair.
Students test whether the amount of air in a basketball affects its bounce height. What is the independent variable? The amount of air in the basketball.
Students test whether the amount of air in a basketball affects its bounce height. What is the dependent variable? The basketball’s bounce height.
Students test whether the amount of air in a basketball affects its bounce height. Name two constants. The basketball and the height from which it is dropped.
Students compare soap brands to see which removes the most dirt. What is the independent variable? The soap brand.
Students compare soap brands to see which removes the most dirt. What is the dependent variable? The amount of dirt removed.
Students test which size paper airplane flies farthest. What factor should they change? The size of the paper airplane.
Students test which size paper airplane flies farthest. Name two conditions they should keep the same. The paper type and the throwing method.
Why should scientists repeat trials? To check whether results are consistent and make conclusions more reliable.
A student records a plant’s height each day. Is the student collecting data or making a hypothesis? Collecting data.
What is an observation? Something noticed using the senses or measured using a tool.
What is an inference? An explanation based on observations and what you already know.
Which tool measures the height of a plant? A ruler or meter stick.
Which tool measures the mass of a rock? A balance.
Which tool measures temperature? A thermometer.
Which tool measures liquid volume? A graduated cylinder.
Which tool measures elapsed time? A stopwatch.
A particle model uses large circles to represent tiny particles. What is one limitation of the model? It does not show the particles’ actual size.
An engineer tests a bridge model and it collapses. What should the engineer do next? Improve the design using the test results, then test it again.
What is matter? Anything that has mass and takes up space.
What is mass? The amount of matter in an object.
What is volume? The amount of space something takes up.
Why is air considered matter? Air has mass and takes up space.
A balloon gets larger when air is blown into it. What does this show about air? Air takes up space.
Which state of matter has a definite shape and a definite volume? Solid.
Which state of matter has a definite volume but takes the shape of its container? Liquid.
Which state of matter has neither a definite shape nor a definite volume? Gas.
How are particles arranged in a solid? They are closely packed.
How do particles move in a solid? They vibrate around fixed positions.
How do particles move in a liquid? They move past one another while remaining close together.
How are particles arranged in a gas? They are spread far apart.
How do particles move in a gas? They move freely throughout their container.
What usually happens to particles’ motion when a substance is heated? The particles move faster.
What usually happens to particles’ motion when a substance is cooled? The particles move more slowly.
What is melting? A change from solid to liquid.
What is freezing? A change from liquid to solid.
What is evaporation? A change from liquid to gas at the liquid’s surface.
What is condensation? A change from gas to liquid.
Does melting require adding or removing thermal energy? Adding thermal energy.
Does freezing require adding or removing thermal energy? Removing thermal energy.
Does boiling require adding or removing thermal energy? Adding thermal energy.
Does condensation involve adding or removing thermal energy from the substance? Removing thermal energy.
Water droplets form on the outside of a cold glass. What change of state occurred? Condensation.
Where does the water on the outside of a cold glass come from? Water vapor in the surrounding air.
A puddle becomes smaller on a warm day. What change of state occurred? Evaporation.
When a puddle evaporates, where does its water go? It becomes water vapor in the air.
Where in a liquid does evaporation occur? At the surface.
Where in a liquid does boiling occur? Throughout the liquid.
Twenty grams of ice melts in a closed container with no matter entering or leaving. What is the mass of the resulting water? Twenty grams.
What is a mixture? Two or more substances combined physically.
Why is soil an example of a mixture? It contains different materials combined together.
What is a solution? A mixture in which one substance dissolves and spreads uniformly throughout another.
Sugar dissolves in tea. What kind of mixture forms? A solution.
Sugar dissolves in water and can no longer be seen. Is the sugar still present? Yes, it is spread throughout the water.
Which tool best separates rocks from sand? A sieve or sifter.
Which tool separates iron filings from sand? A magnet.
How can dissolved salt be separated from water if you want to keep the salt? Evaporate the water, leaving the salt behind.
A student mixes 35 grams of sand with 20 grams of pebbles without spilling anything. What is the total mass? Fifty-five grams.
What is a force? A push or pull.
What are four ways a force can affect motion? It can start motion, stop motion, change speed, or change direction.
What unit measures force? Newtons.
What is net force? The overall force after combining all forces acting on an object.
What are balanced forces? Forces that combine to produce a net force of zero.
What are unbalanced forces? Forces that combine to produce a net force greater than zero.
Two students push opposite sides of a box with equal forces. What is the net force? Zero newtons.
A box starts at rest and has balanced forces acting on it. What happens to its motion? It remains at rest.
A box is pulled right with 18 N and left with 11 N. What is the net force? Seven newtons to the right.
Two students push a cart in the same direction with forces of 12 N and 8 N. What is their combined force? Twenty newtons in that direction.
Team Red pulls left with 90 N, and Team Blue pulls right with 120 N. What is the net force? Thirty newtons to the right.
What kind of force is needed to change an object’s motion? An unbalanced force.
Can forces act on an object that is not moving? Yes, the forces may be balanced.
What is friction? A force that resists motion between surfaces touching each other.
A toy car rolls farther on smooth tile than on thick carpet. What is the likely explanation? The tile provides less resistance to the car’s motion.
What force helps bicycle brakes slow a bicycle? Friction.
When friction slows an object, what happens to some of its kinetic energy? It changes into thermal energy.
Two carts receive the same net force. Cart A has a mass of 3 kg, and Cart B has a mass of 9 kg. Which has the greater change in motion? Cart A, because it has less mass.
Two identical carts receive different net forces. Which has the greater change in motion? The cart receiving the greater net force.
What two measurements are needed to calculate average speed? Distance traveled and elapsed time.
Runner A travels 60 meters in 10 seconds. Runner B travels 85 meters in 10 seconds. Which has the greater average speed? Runner B.
What two pieces of information are given by “15 kilometers per hour north”? Speed and direction.
What is kinetic energy? Energy of motion.
What is potential energy? Stored energy.
Does a rolling ball have kinetic energy or gravitational potential energy because of its motion? Kinetic energy.
What kind of energy does a book have because it is raised above the floor? Gravitational potential energy.
Which objects have kinetic energy: a moving skateboard, a resting book, a swinging swing, and a parked bicycle? The moving skateboard and swinging swing.
A ball falls from a shelf. What happens to its gravitational potential energy as it falls? It decreases.
A ball falls from a shelf. What happens to its kinetic energy as it speeds up? It increases.
A moving marble hits a still marble and makes it move. What happened to energy? Energy transferred between the marbles.
Is energy destroyed when two toy cars collide? No, energy transfers and may change into sound or thermal energy.
What produces sound? Vibrating matter.
What is a vibration? A rapid back-and-forth motion.
Can sound travel through solids, liquids, and gases? Yes, through all three.
Why can sound not travel through empty space with no matter? Sound needs matter to carry its vibrations.
Put iron, water, and air in order from fastest to slowest sound travel. Iron, water, air.
How can whales communicate through ocean water? Sound travels through water.
What is pitch? How high or low a sound is.
What is frequency? The number of vibrations each second.
What happens to pitch when an object vibrates faster? The pitch becomes higher.
What happens to pitch when an object vibrates more slowly? The pitch becomes lower.
An adult’s voice has a lower pitch than a child’s voice. Which voice has the lower vibration frequency? The adult’s voice.
Two otherwise identical strings have different vibrating lengths. Which produces the higher pitch? The shorter string.
Four otherwise identical strings have vibrating lengths of 8, 12, 16, and 20 cm. Which produces the highest pitch? The 8-centimeter string.
Four otherwise identical strings have vibrating lengths of 8, 12, 16, and 20 cm. Which produces the lowest pitch? The 20-centimeter string.
Covering more holes on a recorder makes its vibrating air column longer. What happens to its pitch? The pitch becomes lower.
Two otherwise similar whistles have different air-column lengths. Which usually produces the higher pitch? The whistle with the shorter air column.
Two otherwise similar drums have different-sized heads. Which usually produces the lower pitch? The drum with the larger head.
Which use sound to communicate: a ringing telephone, a glowing lamp, a speaking teacher, and a car horn? The ringing telephone, speaking teacher, and car horn.
Why is sound a form of mechanical energy? It involves motion and vibration of matter.
Students grow identical seeds with equal water and sunlight but use different soils. What is the independent variable? The soil type.
Students grow identical seeds in different soils and measure plant height after four weeks. What is the dependent variable? Plant height.
Plants grow to these heights after four weeks: sand—5 cm, clay—7 cm, garden soil—12 cm, loam—16 cm. Which soil produced the tallest plants? Loam.
Plants in loam grow to 16 cm, and plants in sand grow to 5 cm. How much taller are the plants in loam? Eleven centimeters.
A bar graph compares plant heights in different soils. What should the horizontal and vertical axes show? Horizontal axis: soil types. Vertical axis: plant height with units.
A line graph shows speeds of A—2, B—5, C—5, D—11, and E—7 km/h. Between which neighboring points does speed increase the most? Between C and D.
A line graph shows speeds of A—2, B—5, C—5, D—11, and E—7 km/h. Between which neighboring points does speed remain the same? Between B and C.
A line graph shows speeds of A—2, B—5, C—5, D—11, and E—7 km/h. Between which neighboring points does speed decrease? Between D and E.
What does an upward trend on a line graph show about the measured value? It is increasing.
What does a downward trend on a line graph show about the measured value? It is decreasing.
What does a horizontal section on a line graph show about the measured value? It remains the same.
A toy car travels farthest on tile in all three trials compared with carpet and grass. Which surface appears to offer the least resistance? Tile.
Why should a scientific conclusion include evidence from the investigation? Evidence supports the conclusion.
Created by: MrLittle5
Popular Math sets

 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards