Year 9 science test

Question 1

Equation to work out GPE

Answer 1

m x g x h

Question 2

Equation to work out KE

Answer 2

1/2 x mass x velocity squared

Question 3

Name all types of energy

Answer 3

Kinetic, Heat/thermal, light, gravitational potential, chemical, sound, elastic, electrical, Nucleur

Question 4

What is conversion of energy?

Answer 4

Energy can NEVER be created or destroyed but it can be stored and transferred

Question 5

What is the equation for efficiency?

Answer 5

Useful energy out
—————————
Total energy in

Question 6

What is the gravity on earth?

Answer 6

10N/kg

Question 7

What is kinetic energy?

Answer 7

The energy an object has because of motion, anything that’s moving has kinetic energy

Question 8

Equation to work out the weight of something

Answer 8

Mass x gravitational field strength

Question 9

What is gravity measured in?

Answer 9

N/kg

Question 10

What is velocity measured in?

Answer 10

m/s

Question 11

What is height measured in

Answer 11

M (metres)

Question 12

What is mass measured in?

Answer 12

Kg

Question 13

What does dissipated mean?

Answer 13

Scattered, spread out or diffused

Question 14

What is conduction?

Answer 14

Energy transmitted through solids

Question 15

What is convection?

Answer 15

Moving currents of air carry the heat away

Question 16

What is radiation?

Answer 16

How surfaces radiate energy to the surroundings

Question 17

What is GPE measured in

Answer 17

Joules

Question 18

What is KE measured in?

Answer 18

Joules

Question 19

What is microscopy?

Answer 19

The use of a microscope

Question 20

What is an object in biology?

Answer 20

The real object or sample you’re looking at eg onion cells

Question 21

What’s an image in biology?

Answer 21

The image you see when you look DOWN the microscope

Question 22

What does magnification mean?

Answer 22

How many times larger the image is than the object

Question 23

How do you work out magnification

Answer 23

Image size
—————-
Object size

Question 24

What’s is Resolution in biology?

Answer 24

A measure of how detailed the image is

Question 25

Advantages of a light microscope?

Answer 25

Less expensive, allows you to view samples of cells and specimen close up

Question 26

What type of cells are plant and animal cells

Answer 26

Eukaryotes cells

Question 27

What type of cells are bacteria cells?

Answer 27

Prokaryotes cells

Question 28

Name the parts of an animal cell

Answer 28

Cell membrane, nucleus, ribosomes, mitochondria, cytoplasm

Question 29

Name the parts of a plant cell

Answer 29

Cell membrane, nucleus, michondria, cytoplasm, ribosomes, cell wall, permanent vacuole, chloroplast

Question 30

Name the parts if a bacteria cell

Answer 30

Capsule, DNA, flagellum, pili, plasma membrane, ribosomes, cell wall, cytoplasm

Question 31

Steps on how to make a slide

Answer 31

1. Choose a sample of a specimen and peel a thin layer of epidermal off it 2. Place the layer of the cell on a slide 3. Put a drop of water or iodine on top of the cell 4. Lower the coverslip onto the cell and liquid using a toothpick or needle to prevent air bubbles 5. Place the cell onto the microscope and look at it

Question 32

What are specialised cells?

Answer 32

Cells that are designed to carry out a specific role in the body

Question 33

What are the main parts of cells?

Answer 33

Nucleus, cell membrane, cytoplasm

Question 34

What is distillation?

Answer 34

Separating liquid from a solution

Question 35

What is fractional distillation?

Answer 35

Separating mixtures of liquid

Question 36

What’s a fractionating column?

Answer 36

A tube full of little glass rods with a cooler at the top

Question 37

What is a soluble substance?

Answer 37

A substance that WILL dissolve in a liquid

Question 38

What is an insoluble substance?

Answer 38

A substance that WONT dissolve in a solvent

Question 39

What are the 3 states of matter?

Answer 39

Solid, liquid and gases

Question 40

What are the forces of attraction like in a solid?

Answer 40

Strong forces of attraction between particles

Question 41

What are the forces of attraction like in a liquid?

Answer 41

Weak force of attraction

Question 42

What are the forces of attraction like in a gas?

Answer 42

No forces or very weak forces

Question 43

What are the Properties of a solid?

Answer 43

Strong forces, arranged neatly in rows, can vibrate in their position, definite shape and structure, fixed position

Question 44

What are the Properties of a liquid?

Answer 44

Weak force oof attraction, free to move but fairly compact, definite volume, can flow, no arranged position

Question 45

What are the properties of a gas?

Answer 45

No/very weak force of attraction, free to move, no arranged shape, constantly moving with random motion

Question 46

What is chromatography?

Answer 46

A separation technique to separate soluble substances eg ink or food colouring

Question 47

How can you tell if a substance is pure in chromatography

Answer 47

Only produces one spot

Question 48

What is is called when a solid turns into a gas

Answer 48

Sublimation

Question 49

What’s it called when a gas is turned into a solid

Answer 49

Deposition

Question 50

What’s it called when a liquid turns into a gas?

Answer 50

Evaporation

Question 51

What’s it called when a gas turns into a liquid?

Answer 51

Condensation