Question | Answer |
What two things does matter have? | Volume and mass |
What is mass? | How much matter is inside something |
which is denser - a one inch block of gold or a one inch block of wood? | A block of gold |
What are the three states of matter? | Solid, liquid, and gas |
In which state of matter are molecules most active? | gas |
In which state of matter are molecules least active? | Solid |
Which two states of matter do not have a particular form or shape but take on the shape of their container? | Gas and Liquid |
What do we call the point at which a solid becomes a liquid? | Melting Point |
What do we call the point at which a liquid becomes a gas? | Boiling Point |
What temperature is the freezing point of water? | 32 degrees Fahrenheit or 0 degrees Celsius |
What temperature is the boiling point of water? | 212 degrees Fahrenheit or 100 degrees Celsius. |
What is an atom? | The smallest particle of an element that keeps the properties of that element |
What is an element? | A substance made up of only one kind of atom |
What is the charge of a proton? | Positive |
What is the charge of an electron? | negative |
What is the charge of a neutron? | neutral |
What do we call a solid with a regular, repeating arrangement of atoms? | A crystal. |
Which kind of polymer is widely used because it's light, easy to shape, and can be recycled and remolded into other things? | Plastic |
Which kind of reaction changes a substance into a different substance? | A chemical reaction. |
Which kind of reaction changes only the form or appearance of a substance? | A physical reaction |
True or false: A base tastes like vinegar and corrodes metal. | False |
What do we call a mixture in which the individual parts cannot be seen as separate? | Homogeneous |
Wht do we call a mixture in which the individual parts can be easily seen/ | heterogeneous |
Which law states that objects at rest tend to stay at rest and objects in motion tend to stay in motion in a straight line unless acted upon by a force/ | Newton's first law of mtion |
Which law States that for every action there is an equal and opposite reaction? | Newton's third law of motion |
Friction is a force that resists movement between two objects, true or false? | True |
What does a lubricant do? | Reduces friction to make movement easier. |
What is the law of universal gravitation? | All objects are attracted to other objects according to their mass and distance. |
What do we call the ability of someone or something to do work? | Energy |
What is kinetic energy? | Energy in motion |
What is potential energy? | Stored energy |
Can energy be created or destroyed? | No |
Name to forms of energy we get from fossils. | Oil, coal, natural gas |
Names two kinds of renewable energy. | Hydropower, biofuels, geothermal, wind, solar, hydrogen |
What do we call vibrations that travel through a material from a source? | Sound |
Ultrasound is too low for our ears to hear, true or false? | False |
What does ROY G. BIV stand for? | Red, orange, yellow, green, blue, indigo, violet |
What are the two kinds of invisible light at each end of the light spectrum? | Infrared and ultraviolet |
What do we call it when things become less and less ordered? | Entropy or the second law of thermodynamics. |
Radiant heat can travel through space, true or false? | True |
What three things are needed to start a fire? | Oxygen, fuel, and heat |
Electricity flows into your house through a direct current, true or false? | False |
What is the region around a magnet that produces a magnetic force? | A magnetic field |
What is the earth's core made out of? | Mostly liquid iron |
A magnet powered by an electric current that can be turned off and on is called an electromagnet, true or false? | True |
What is an inclined plane that's wrapped around a cone or cylinder? | A Screw |
What lever has the fulcrum in the center and the load and effort on opposite ends? | A first-class lever |
What must a wheel have to work? | An axel |
What do we call the device that moves around and around on a treadmill? | A drive belt |
Which pulley system makes work easier - a single pulley system or a double-pulley system? | A double-pulley system. |