Simple Machines
A machine that you apply just one force to is a ______________.
What is a simple machine?
Which shows that matter may be changed but the weight will not change?
A. Some papers weigh less after they have burned.
B. A clay ball that is 5 cm long is then rolled into a snake 10 cm long.
C. When comparing markers, 20 thin markers will fit in the same box as 10 regular.
D. A candle that has only burned for 30 seconds should still weigh the same.
What is B?
Which is an example of a different substance being formed?
A glass breaking
B metal melting
C water freezing
D wood burning
What is D? wood burning
In which state of matter are the particles packed together in a tight pattern?
What is a solid?
A push or pull that causes a change in motion.
What is force?
A bar that pivots on a fixed point.
What is a lever?
Samantha and John were each given a ball of clay of the same weight. Both students used all of their clay to make an object. Samantha rolled hers into a ball. John made a long, skinny rope. What is the weight of the clay figures now?
A. Samantha’s weights more because it is round.
B. John’s weighs more because it is long.
C. There is no way of knowing which one weighs more.
D. The figures would be equal in mass.
What is D? The figures would be equal in mass.
Which is the best example of a physical change?
A ice melting
B bread baking
C candle burning
D an apple turning brown
What is A? ice melting
Why do liquids have more movement than a solid?
Their particles are spaced farther apart and can move around.
A force that works against motion.
A wheel with a line/rope around it.
What is a pulley?
A student notices that an inflated balloon gets larger when it is warmed by a lamp. Which best describes the mass of the balloon as a result of this change?
A The mass of the balloon increases because the size of the balloon has increased.
B The mass of the balloon increases because the temperature of the balloon has increased.
C The mass of the balloon stays the same because the gas inside the balloon still has the same mass after it warms up.
D The mass of the balloon stays the same because warming decreases the mass enough to cancel out the effect of increasing the size.
What is C? The mass of the balloon stays the same because the gas inside the balloon still has the same mass after it warms up.
Which of the following activities results in the formation of a new material?
A chopping wood
B slicing a pizza
C baking a cake
D mixing sand and water
What is C? baking a cake
When a liquid changes to a solid
What is freezing?
Forces that act on an object but cancel each other.
What is balanced forces?
A slanted surface.
What is an inclined plane?
You place several ice cubes weighing 40 grams in water weighing 2000 grams. When the ice cubes melt, what will be the total weight of the water, assuming the water does not evaporate?
A.) 40 grams
B.) 1960 grams
C.) 2000 grams
D.) 2040 grams
What is D? 2040 grams
Which of the following is an example of a chemical change?
a. melting butter
b. mixing milk and chocolate syrup
c. breaking glass
d. burning fuel
What is D? buring fuel
What does matter need to change its state?
What is a change in temperature. Either add or remove heat.
When the forces in one direction are stronger, so they don’t cancel each other?
What is unbalanced forces?
Two inclined planes places back-to-back.
What is a wedge?
Solution A has a mass of 60 g. Solution B has a mass of 40 g. When they are mixed, a chemical reaction occurs in which gas is produced. If the mass of the final mixture is 85 g, what was the mass of gas produced?
A. 15 g
B. 40 g
C. 85 g
D. 100 g
What is A? 15 g
Vinegar is added to baking soda and bubbles of carbon dioxide rapidly form. A cloudy liquid is left behind. What are products in this chemical reaction?
A. vinegar and the cloudy liquid
B. vinegar and baking soda
C. carbon dioxide and baking soda
D. carbon dioxide and cloudy liquid
What is D? carbon dioxide and cloudy liquid
Which state of matter has no definite volume?
What is a gas?
When objects in the universe pull on one another.
What is gravitational force?