Review Game Zone
Flash Cards
(current)
Games
Teachers
Search
Unit 1-Gr. 8 Science Assessment Review-2015
Test Description: Matter and Conservation of Mass
Instructions: Answer all questions to get your test result.
1) Why did the mass of the closed balloon-bottle system stay the same?
A
the same number of atoms were conserved
B
the temperature changed
C
people weighed it wrong
D
the molecules grew bigger when heat was added
2) A student has one liter of cotton and one liter of copper pennies. Which statement best compares the masses of the two samples?
A
The mass of the cotton is the same as the mass of the pennies.
B
The masses cannot be compared without a balance.
C
The mass of the cotton is greater than the mass of the pennies.
D
The mass of the cotton is less than the mass of the pennies.
3) Which of the following substances can be separated into several elements?
A
aluminum
B
zinc
C
water
D
nitrogen
4) Sugar is composed of carbon, hydrogen, and oxygen. Sugar is an example of which of the following?
A
an atom
B
an electron
C
a compound
D
a mixture
5) Which of the following is the smallest form of matter?
A
a mixture
B
an atom
C
an electron
D
a compound
6) When 1 gram of water is evaporated in a sealed container, the volume of the water vapor increases but the mass remains constant. Why?
A
The pressure acting on the water remains constant.
B
The temperature of the water remains constant.
C
The distance between water molecules remains constant.
D
The number of atoms in the water remains constant.
7) Which statement is true about Conservation of Mass?
A
Elements combine to form compounds.
B
Matter is made up of particles too small to see.
C
Air is made of particles, but has no mass.
D
Matter can never be created or destroyed.
8) Which of the following equations is balanced?
A
Na + O2 ---------Na2O
B
4Na + O2-------- 2Na2O
C
2Na + O2 -------- 2Na2O
D
Na + O2 ---- 2Na2O
9) Which of the following equations is balanced?
A
4Al + 2O2 ----------- 2Al2O3
B
4Al + 3O2 ------------- 2Al2O3
C
Al + O2 -------- Al2O3
D
Al + 2O2 -------- 2Al2O3
10) How many molecules are in the compound sodium carbonate 3Na2CO3?
A
3
B
6
C
7
D
1
11) How many different atoms are in the compound sodium carbonate (Na2CO3)?
A
3
B
1
C
7
D
6
12) How many different elements are in the compound sodium carbonate (Na2CO3)?
A
7
B
3
C
1
D
6
13) Which of the following is formed when two or more different elements combine chemically?
A
a molecule
B
an atom
C
a mixture
D
a compound
14) Which statement best explains what happens to the atoms in gold (Au) when the temperature of the metal is increased?
A
The atoms move more quickly.
B
The atoms move more slowly.
C
The motion of the atoms stays the same.
D
The motion of the atoms becomes very orderly.
15) Which statement best describes what happens to the motion of the water molecules after heat is added?
A
The molecules move apart and move more quickly.
B
The molecules come together and move more quickly.
C
The molecules come together and move more slowly.
D
The molecules move apart and move more slowly.
16) How does increasing heat energy affect hydrochloric acid (HCl) molecules?
A
The motion of the molecules increases.
B
The motion of the molecules decreases.
C
The motion of the molecules is at a constant rate.
D
The motion of the molecules stops.
17) Which of the following substances would keep the same volume but different shape if they were moved from a rectangular container to a round shaped container?
A
a cell phone
B
10 mL of juice
C
air in a balloon
D
steam from a pot
*select an answer for all questions
Check Results & Get Answers
Play Games with the Questions Above
Teachers: Create FREE classroom games with your questions
Click for more info!
©2007-2024
ReviewGameZone.com
|
About
|
Privacy
|
Contact
|
Terms
|
Site Map
WAIT! Find what you needed?
×
Still Looking for the Answers?
Have Another Question?
Play a Review Game with These Questions?
Want to Make Your Own Test Like This One?