Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
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
Normal Size Small Size show me how
Science UIL
8th grade
| Question | Answer |
|---|---|
| NFPA label | system for identifying hazardous materials |
| Use a ____________ _______________ for small fires. | fire extinguisher |
| independent variable | the thing in the experiment that changes |
| Radioactive symbol | looks like a beach ball |
| Elements in the same group will all have the same number of _____________ ___________ | valence electrons |
| Valence electrons determine an atom's __________________ | reactivity |
| An element has an atomic number of 7. How many protons does it have? | 7 |
| An element has an atomic number of 7. How many electrons does it have? | 7 |
| What are the 3 subatomic particles in an atom? | proton, electron, neutron |
| A ________________ has a positive charge. | proton |
| An ____________ has a negative charge. | electron |
| A _____________ has a neutral, or no charge. | neutron |
| Is this equation balanced or unbalanced? 2SO2 + O2 + 2H2O -------> 2H2SO4 | balanced |
| In the molecule 2CH4, there are _____ Carbon and _____Hydrogen. | 2,8 |
| magnitude | size |
| Seasons are due to the __________ of the Earth. | tilt |
| Which part of the Earth has the least amount of seasonal variation? | equator |
| We have day and night because of the Earth's ___________. | rotation |
| Trent walked 340 meters in 93.5 seconds. Using division you can determine his ____________. | speed |
| Tony walked 340 meters Northwest in 93.5 seconds. Determining speed in a given direction is ___________ | velocity |
| Newton's 3rd Law of Motion | every action has an equal and opposite reaction |
| waxing gibbous moon | more than half illuminated |
| Graph showing stars size, temperature, and brightness. | Hertzsprung Russell |
| The Milky Way galaxy is a ____________ shape. | spiral |
| Laurasia | a northern continent that existed millions of years ago. |
| _____________ rays cannot be captured and reflected using mirrors. | Gamma |
| Continental plates pull apart and cause a _________ _________. | Rift valley |
| plates on the Earth's crust pull apart | divergent |
| plates on the Earth's crust push together | convergent |
| Thermal energy always moves from __________ to __________. | hot to cold |
| Contour lines on a topographic map represent ____________ | elevation |
| Contour lines on an elevation map never _______________ | cross each other |
| Which theory about the origin of the universe postulates that matter is created constantly throughout the universe? | Steady State Theory |
| Warm and cold front together | occluded front |
| Most hurricanes form at the _________ | equator |
| Hurricanes form over __________ water. | warm |
| Artificial Reef | sunken ships or other structures that have become homes for fish |
| nucleon | protons + neutrons |
| velocity | speed and direction |
| Calibrate | set a scale to measure correctly |
| What system of measurement units is used worldwide? | the SI system |
| What subatomic particles are located in the nucleus of an atom? | proton and neutron |
| ______________________ are located in the electron cloud. | electrons |
| Electrons on the outermost level of energy are called ____________ | valence electrons |
| An atom has an atomic # of 4 and a mass of 9. How many electrons does it have? | 4 |
| What is the chemical name for N2F7? di - 2 hepta -7 | dinitrogen heptafluoride |
| How do you balance a chemical equation? | change the coefficient |
| coefficient | large number before a molecule in a chemical formula |
| subscript | small number after an element in a chemical formula |
| Newton's 2nd Law | an object acted on by a force will accelerate in the direction of the push |
| What causes day and night? | Earth's rotation |
| The lunar cycle has _____ key phases. | 8 |
| The Sun is made mainly of _____________ and __________. | hydrogen and helium |
| A galaxy moving toward Earth will show a ___________ shift in the spectrum. | blue |
| lithosphere | Earth's crust |
| When seafloor spreading happens, volcanoes form new _______ | land |
| Warm air rises, cold air sinks | convection |
| The center of a hurricane is called the _____. | eye |
| At the top or end of every food chain is a _______________. | predator |
| biotic | living |
| abiotic | non-living |
| a graduated cylinder measures ________ | volume |
| 1 meter is about _____ yard | 1 |
| An atom with 7 valence electrons is not very __________ | reactive |
| An atom with 1 valence electrons is very __________ | reactive |
| An atom's 1st energy level is full with ____ electrons | 2 |
| An atom's 2nd and 3rd energy levels are full at ____ electrons. | 8 |
| F=ma | Force = mass x acceleration |
| High tide occurs _____ times each day. | 2 |
| Stars appear to be different sizes because of their _____________ | distance from us. |
| AU | astronautical units |
| symbiosis | organisms benefit each other |
| mutualism | both organisms benefit |
| autotroph | plant |
Created by:
vbernet