Junior Masterchef

Question 1

How do you work out how long a wave length in the choclate experiment?

Answer 1

You find and measure the melted spots distance from eachother and multiply by two to find 1 full wave length

Question 2

What are the parts of a scientific wave?

Answer 2

Crest Crest
/ \ ______ / \
/ \ 1/2 / \
}Trough {_____} {
|___wavelength__|

Question 3

What are the 6 rules of the particle theory?

Answer 3

1. Everthing is made up of particles
2. Particles are always moving
3. There are tiny spaces between particles
4. When you heat up particles, they move faster
5. When you cool down particles, they move slower
6. Particles are attracted to eachother

Question 4

What are the 3 changes of state?

Answer 4

Solid, liquid and gas

Question 5

What is the process called when a solid becomes a liquid?

Answer 5

Melting

Question 6

What is the process called when a liquid becomes a gas?

Answer 6

Evaporating

Question 7

What is the process called when a gas becomes a liquid?

Answer 7

Condensing

Question 8

What is the process called when a liquid becomes a solid?

Answer 8

Freezing

Question 9

What is the point halfway between a substance being a liquid and a gas?

Answer 9

Boiling point

Question 10

What is the point halfway between a substance being a solid and a liquid?

Answer 10

Freezing point

Question 11

What is the process called when a gas DIERECTLY becomes a solid?

Answer 11

Deposition

Question 12

What is volume?

Answer 12

The amount of space an substance takes up

Question 13

What is mass?

Answer 13

The matter that substances are made of measured in weight

Question 14

What is density?

Answer 14

The state or quality of being dense, compactness, closely set or crowded condition

Question 15

What unit is density measured in?

Answer 15

g/cm3

Question 16

What unit is mass measured in?

Answer 16

g

Question 17

What unit is volume measured in?

Answer 17

cm3

Question 18

How do you work out the density of an object?

Answer 18

Mass/volume

Question 19

How can you work out the volume of an object?

Answer 19

Mass/density or displacement method

Question 20

How can you work out the mass of an object?

Answer 20

Density x volume or weigh it

Question 21

What is the displacement method for volume?

Answer 21

• fill a jug to 50ml (exactly) with water
• place object in jug and record the new water level
• subtract 50ml from the current water level and there is your volume

Question 22

What is one way to test the density of an object?

Answer 22

See if it floats in water. If it has a higher density than water it will sink and if it has a lower density than water it will float

Question 23

Do all forms of a substance have mass? And how can you prove it?

Answer 23

Yes. solids, liquids and gases have mass and you can prove this by weighing them

Question 24

Do all forms of a substance take up space?

Answer 24

Yes. Solids, liquids and gases all take up space

Question 25

How do you figure out the speed of light/microwaves?

Answer 25

Wavelength x frequency

Question 26

1ml of water is equivilent to what in volume?

Answer 26

1cm3