These particles are very close together, and cannot move very far. They are stuck together in a rigid pattern. What state of matter is it?
Solid
100
How much matter an object has is its ___________
mass
100
d=_______
mass/volume
100
You need to move a car. You push the car, and it starts rolling. What kind of force did you put on the car?
Unbalanced force.
200
We test a material for _________ when we scratch it with a nail
hardness
200
This state of matter has a definite volume, but not a definite shape
liquid
200
How much space a material takes up is ........
volume
200
An object has mass of 48 grams. It has a volume of 8 cm3. What is its density?
6 g/cm3
200
When a moving object touches something, a force pushes against the object. What is this force called?
friction
300
How far you can pull or stretch a material before it breaks is ......
Tensile strength
300
The volume of this state of matter is measured in mL
Liquid
300
mass is measured in ....
kg
300
Buoyancy is an object's ability to sink or float in a liquid. Metal is denser than water, but a metal ship can still float.
How?
The ship contains a lot of air inside it, which is much less dense than water. It makes the ship buoyant.
300
When a car is driving, or you are running, or a spaceship is entering the atmosphere there is always a force pushing against it. What is this force called?
air resistance
400
Flexibility means you can bend something, but it won't break easily. What is it called when it will go back to its original shape?
elasticity
400
When matter changes from a solid to a liquid, it is called....
melting
400
volume is measured in ......
cm3 or mL (for a liquid)
400
two objects are the same volume. One weighs more in kg. Explain why, describing the particles.
The heavier object has more particles packed closer together than the lighter one
400
Pressure = ????
force/area
500
A material is opaque, is a good electrical insulator, but is not flexible or elastic. What could it be?
Multiple answers: wood, a rock, dirt, really hard plastic, ceramic.
500
When matter changes from a gas to a liquid, it is called...
condensing
500
How can we measure the volume of a solid object?
1. measure the length, width, and height, and multiply them
2. melt the material into a liquid
3. place it in a beaker with water. The amount of mL it displaces is equal to the volume of the object, in cm3
500
Which has more mass, or are they equal: 1 mL of water, or 1 cm3 of ice?
1 mL of water
500
Why do you ears hurt when you go deep underwater?
The water pressure outside your head is greater than the air pressure inside your head.