Force
A force can cause an object to speed up, slow down, change direction, or______________
Change its shape
___________ is the ability to do work or cause change.
Energy
What is the main source of energy for Earth which provides heat and light and drives the water cycle?
The Sun
What is force that pulls objects toward the center of the Earth.
Gravity
Heat always flows from this temperature to this temperature.
cold to hot
This scientist formulated the three laws of motion and the law of universal gravitation.
Sir Isaac Newton
What is stored energy, such as in a stretched rubber band?
potential energy
This form of energy stored in gasoline or batteries.
Chemical Energy
This is what happens when you try to push the North pole of one magnet toward the North pole of another magnet.
They repel
If you are stirring hot soup, this type of spoon (wood or metal) would stay the coolest.
Wooden
This force converts some kinetic energy into heat when two surfaces move against each other, causing them to eventually slow down.
Friction
This type of energy is produced when objects vibrate.
Sound Energy
A solar panel changes energy from the Sun into this form that can power homes and devices.
Electrical Energy
This is the "upward" force exerted by a fluid that opposes the weight of an immersed object.
Buoyancy/upthrust
What are the states of matter?
Solid. liquid and gas
A force that acts without touching an object is called ____________
Non-contact force
Coal, oil, and natural gas are examples of this group of energy resources because they take millions of years to form.
non-renewable energy
This source of energy depends on the remains of plants and animals that lived millions of years ago.
Fossil fuels
If you drop a flat sheet of paper and a crumpled ball of paper at the same time, the crumpled ball hits the ground first. This is because the flat sheet has more surface area, which creates more of ____________ to slow it down.
Air resistance
What happens to molecules in a substance when it gains heat but doesn’t change state.
They vibrate
According to Newton’s first law, an object at rest stays at rest unless acted on by this.
unbalanced force
What name is given to energy that comes from moving water in rivers or dams.
Hydroelectric energy
This renewable source of energy comes from heat inside the Earth.
Geothermal energy
List two examples of a non-contact force.
Gravity and magnetsim
This method of heat transfer works best in solids because its atoms are packed very tightly together, allowing them to bump into each other easily.
Conduction