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Semester 1 Review
Test Description: Review
Instructions: Answer all questions to get your test result.
1) Which has acceleration?
A
A ball sitting on the top of a hill
B
A bicycle turning
C
A dog walking at a steady speed
D
A car going a constant speed
2) How many atoms make up Na2SO4?
A
7
B
12
C
6
D
10
3) Which of these is an example of a physical reaction?
A
Baking soda and vinegar
B
Crushed candy cane
C
Burning wood
D
Iron rusting
4) What causes a rocket to move upward into the sky?
A
Gravity
B
Action/reaction forces
C
Friction
D
Potential energy
5) Your friend added several bags of groceries to his empty wagon. You could expect--
A
It uses less energy to move.
B
It takes longer to accelerate.
C
It needs less time to stop.
D
It moves faster.
6) Which part of digestion is a chemical change?
A
Saliva reacts with food to break it down.
B
Your teeth grind food into smaller pieces.
C
Food moves from your mouth to your stomach.
D
The stomach churns solid food into a liquid.
7) When is work being done?
A
When the student walks across the school.
B
When the student holds her backpack.
C
When the student picks up the backpack and walks away.
D
When the student picks up her backpack.
8) A car burning gas has what kind of energy transformation?
A
nuclear to heat to mechanical
B
mechanical to heat to chemical
C
heat to chemical to mechanical
D
chemical to heat to mechanical
9) How many atoms of hydrogen are in the molecule Ba(CH5O2)2
A
7
B
4
C
5
D
10
10) When a football is thrown, where does it have the least potential energy?
A
When the quarterback is holding it.
B
When the ball is moving through the air.
C
When the receiver is just about to catch it.
D
When the ball left the quarterback's hand.
*select an answer for all questions
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