FREE EARTH SCIENCE AND STUDY GAMES ABOUT 8TH GR

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FREE EARTH SCIENCE AND STUDY GAMES ABOUT 8TH GR

SCI CH 2 TEST EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -114 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: Name the state of change of the following...

water vapor becomes liquid water droplets

Answer:

condensation

Question 2: The quantity of matter in an object of substance

Answer:

mass Question 3: Happens when vaporization happens so fast that bubbles form in a liquid

Answer:

boiling Question 4: Would you do more work lifting a box from the floor to the top of a table, or from the floor to a shelf above your head? Why?

Answer:

floor to the shelf above your head because you go against gravity more and you have more height to cover.

Question 5: Name 3 ways to measure matter

Answer:

You can measure matter by weight, volume & mass

Question 6: It gives objects weight

Answer:

gravity Question 7: T or F: when a log burns, its matter disappears.

Answer:

False Question 8: How is the plasma state of a substance different from the gas of the same substance?

Answer:

Plasmas act like gases, but their particles move so fast & collide so hard that they break apart & become electrically charged. Gases are far apart & move very fast. They have no attraction for each other, no fixed shape, & no constant volume.

Question 9: Anything that occupies space and has a mass

Answer:

matter Question 10: When warm temperatures move particles of a solid far apart forming a liquid

Answer:

melting

Question 11: Which force is significant in producing a landslide?

gravity, magnetism, tension or electrical

Answer:

gravity

Question 12: The smallest building block of matter

Answer:

atom

Question 13: What is a chemical compound?

Answer:

The atoms from an element bonded with the atoms from other elements.

Question 14: How would a scientist define work?

Answer:

Force that acts on an object as it moves through a distance.

Question 15: The gravitational attraction for an object's mass

Answer:

weight Question 16: A glass of milk sits on a table. What forces act on the glass of milk?

Answer:

Gravity

Question 17: Name the force responsible for the following...

a rope holding up a cave explorer

Answer:

tension Question 18: Identify the main kinds of energy released by the following object.a computer monitor screen

Answer:

light

Question 19: State the kind of change in matter in the example below...

ocean waves & sand erode a sea cave in a solid rock cliff

Answer:

physical

Question 20: A substance's state of matter is most directly affected by its?

Answer:

temperature

Question 21: The change from a liquid state to a vapor

Answer:

vaporization Question 22: Even if scientists do discover dark matter during a LHC experiment, would that prove the universe started with a big bang? Explain.

Answer:

No, because there are still no facts, or a Bible or history telling us that the big bang is real.Question 23: Does the identity of an unchanged atom change when it becomes an ion? explain

Answer:

Yes, the normally equal protons & electrons change to uneven

Question 24: The ability to do work

Answer:

energy

Question 25: Name the state of change for the following...

molten steel hardens

Answer:

freezing (solidification)

Question 26: Name the state of change for the following...

a beaker of liquid oxygen bubbles and forms oxygen gas

Answer:

boiling Question 27: What is the difference between the molecules of an element and the molecules of a compound?

Answer:

A element is made up of only 1 type of atom, a compound bonds with different types of elements.

Question 28: Describe 3 ways matter can change?

Answer:

Physical changes, chemical changes & nuclear changes