10 questions
If you kick a ball into the air, what is the effect?
the ball will go higher and leave the Earth's atmosphere
the ball will come back down because gravity pulls it towards the Earth's center
the ball will come back down because gravity pushes it toward the Earth's poles
the ball will not be impacted by Earth's gravity
Which describe the particles in a solid? Choose all that apply.
they are packed close together
they can flow
they vibrate in place
the particles are able to move around and slide past each other
the particles are very far apart from each other
Which describes a solution? Select all that apply
the individual components can be seen visually
one substance is evenly distributed through another substance
the substances are physically combined
the substances can be separated
If you climb a ladder and drop an apple, what is the effect on the apple?
the apple's mass increases as it gets closer to the ground
the apple's size decreases as it gets closer to the ground
the force of gravity pushes the apple upwards
gravity pulls the apple towards the Earth's center
How would a mixture of iron filings and sand be separated?
dissolve the iron filings in water, then evaporate the water
pour the mixture through a filter
use a magnet to collect the iron filings
put the mixture in water - the iron filings will float and the sand will sink
Which is a true statement about the rate of dissolving substances?
the rate of dissolving will increase when the mixture is stirred
the rate of dissolving will decrease when the mixture is heated
the rate of dissolving will increase when larger particles of solute are used
the rate of dissolving will decrease when smaller particles of solute are used
Which is MOST concentrated?
10 grams sugar in 100 mL water
10 grams sugar in 200 mL water
20 grams sugar in 100 mL water
20 grams sugar in 200 mL water
Which is true for a compound, but not a mixture?
the substances are chemically combined
the substances can be easily separated
the substances are physically combined
the properties of each substance used stay the same
Think of the solution saltwater. Which statement is NOT true about this solution?
the water is the solute
the water is the solvent
the salt is the solute
the salt and water are physically combined
Which of the following has the strongest gravitational pull?
Earth
Jupiter
Saturn
Mars
the sun