PSTAAR Review
Quiz by Robrion Sills
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- Q1
What force keeps planets in the solar system from going in straight lines?
Mechanical Energy
Gravity
Friction
Inertia
30s - Q2
What force causes Venus to travel in a curved path instead of a straight line?
Kinetic energy between Mercury and Venus
Potential energy between the Sun and Venus
Gravity between Mercury and Venus
Gravity between the Sun and Venus
30s - Q3
Celestial objects move in straight lines unless they are acted on by an unbalanced force. Which explains the motion of the planets in the solar system?
The sun moves in an elliptical orbit around the planets.
The planets move in an elliptical orbit around the sun due to the attraction of gravity from the sun
The planets do not move in elliptical orbits.
The forces cancel out.
30s - Q4
Which indicates a chemical change?
solid forms when two clear liquids are mixed together
sugar crystal formation on the side of boiling sugar water in a glass beaker
solid forms when a liquid is frozen
steam from heated water on a stove
30s - Q5
Students conducted the following lab:
1. Pour 150 mL of vinegar in a glass beaker.
2. Measure the starting temperature with a thermometer.
3. Add steel wool to the glass beaker.
4. Record the final temperature with a thermometer.
5. Remove the steel wool.
Which of these indicates a chemical change?
The thermometer showed an increase in temperature at step 4
The steel wool was shown to be more dense than vinegar at step 3
The vinegar filled the container in step 1
The thermometer showed no change in temperature at step 4
30s - Q6
Students completed the following observations:
Liquids 1 and 2 are colorless
Liquids 1 and 2 were mixed to produce and the product was a colorless liquid
Chunky small pieces/particles were created and settled at the bottom
Which of these indicates a chemical change?
A new substance was formed when liquids 1 and 2 were mixed
Liquids 1 and 2 formed a colorless solution
The shape changed
The volume changed
30s - Q7
Which of these indicates a chemical reaction in the process of baking a cake?
The liquid batter fills the container
Water in the batter becomes steam and evaporates
Water from the batter moistens the cake
Bubbles form and a gas is released as the cake is baking
30s - Q8
Nitrogen dioxide can come from cars, factories, wood, and lightning. Which part of this reaction indicates a chemical change has taken place?
The same number of atoms
The reactants and solution are all gases
Formation of a brown gas
Formation of a gas
30s - Q9
A ring made of silver will react with sulfur in the air, making silver sulfide in the process. This substance is black in color and will tarnish the silver ring. To remove the tarnish, the ring was placed in a pot of hot water. Baking soda was added to the pot and the solution was stirred.
Which indicates a chemical reaction took place?
the water was heated
the pot was made of metal
the water was cooled
the solution changed in color
30s - Q10
An object has a volume of 5 cm3and a mass of 20 g. What is the density of the object?
1 g/cm3
4 g/cm3
2 g/cm3
3 g/cm3
30s - Q11
A rock has a volume of 6 cm3 and mass of 24g. What is the density of the rock?
1 g/cm3
4 g/cm3
2 g/cm3
3 g/cm3
30s - Q12
If the rock has a mass of 10g, then what is its density?
2 g/ml
4 g/ml
3 g/ml
1 g/ml
30s - Q13
If the rock has a mass of 15g, then what is its density?
2 g/ml
1 g/ml
4 g/ml
3 g/ml
30s - Q14
If the rock has a mass of 20g, then what is its density?
4 g/ml
3 g/ml
1 g/ml
2 g/ml
30s - Q15
What is the density of substance 1?
4 g/cm3
5 g/cm3
10 g/cm3
30s
