Science Revision Test 3

Question 1

What is the definition for elastic deformation?

Answer 1

Object returns to original shape after stretching or compressing

Question 2

What is the definition for inelastic deformation?

Answer 2

Object is unable to change shape

Question 3

State Hooke’s Law

Answer 3

The extension of the spring is directly proportional to the force applied. This means that if you double the force, the extension also doubles.

Question 4

State Hooke’s Law equation

Answer 4

Force = spring constant x extension (F= ke)

Question 5

Describe what happens to a spring when it is stretched beyond the limit of proportionality

Answer 5

The shape has changed irreversible

Question 6

List the equipment used for the Hooke’s law experiment

Answer 6

Sprint, retort stand/ clamp stand, clamp and boss, masses, ruler

Question 7

State the pressure equation

Answer 7

Pressure = force / area (P=F/A)

Question 8

Explain everyday uses of pressure

Answer 8

Snow shoes walking in snow (bigger surface area)

Camels walking on the sand

Question 9

Explain how a bed of nails work

Answer 9

The weight of the person is spread across a bed of nails, meaning the pressure is spread across these small points.

Question 10

What is an independent variable?

Answer 10

What you change

Question 11

What is a dependant variable?

Answer 11

What you measure

Question 12

What is a control variable?

Answer 12

What you keep the same

Question 13

Write 2 facts about pressure in liquids

Answer 13

The pressure acts all around and increases with depth

Question 14

What is air pressure affected by?

Answer 14

Quantity of particles & temperature

Question 15

Why is the pressure at the top of a mountain less than at the bottom?

Answer 15

There a fewer particles

Question 16

What is the law of conversation of mass

Answer 16

Total mass of reactants = total mass of products

Question 17

Write the formula for water, carbon dioxide, oxygen and hydrogen

Answer 17

H2O, CO2, O2, H2

Question 18

Write the general equation for metals reacting with water

Answer 18

Metal + water —> Metal hydroxide + Hydrogen

Question 19

Write the general equation for metals reacting with acid

Answer 19

Metal + acid —> Salt + hydrogen

Question 20

How does this acid name change when added to a metal

Answer 20

Hydrochloride makes chlorides
Sulphuric makes sulphates
Nitric makes nitrates

Question 21

Define combustion

Answer 21

Burning in oxygen producing heat and light

Question 22

Write the general equation for metals reacting with oxygen (air)?

Answer 22

Metal + oxygen —> Metal Oxide

Question 23

State the order of the reactivity series

Answer 23

Potassium, Sodium, Calcium, Magnesium, Aluminium, Carbon, Zinc, Iron, Lead, Copper, Silver, Gold

Question 24

Why is carbon placed in the reactivity series when it’s not a metal?

Answer 24

Carbon can be used to displace the metals below from their compounds

Question 25

What is the rule for naming 2 elements together in a compound?

Answer 25

Name ends in -ide

Question 26

What is the rule for naming 3 elements together in a compound, with one containing oxygen?

Answer 26

Name ends in -ate

Question 27

Which side of the arrow in an equation shows the reactants?

Answer 27

The left side

Question 28

Which side of the arrow in an equation shows the products?

Answer 28

Right side

Question 29

Write a word equation to make sodium chloride from sodium and chlorine

Answer 29

sodium + chlorine —> sodium chloride

Question 30

How do you test for the presence of hydrogen?

Answer 30

Lit splint will go pop (squeaky pop test)

Question 31

What shows a chemical reaction has happened?

Answer 31

Light produced, colour or temperature change, has given off (bubbles)

Question 32

What is a displacement reaction?

Answer 32

Where a more reactive metal (or carbon) displaces a less reactive metal from the compound

Question 33

Can magnesium displace iron from iron oxide

Answer 33

Yes because magnesium is more reactive than iron

Question 34

Can calcium displace sodium from sodium oxide?

Answer 34

No because sodium is more reactive than calcium

Question 35

Why is carbon used to extract iron from iron oxide?

Answer 35

Carbon is more reactive than iron so it can displace the iron

Question 36

Define electrolysis

Answer 36

Splitting compounds into individual elements using electricity

Question 37

What state does the compound need to be in for electrolysis?

Answer 37

Molten (liquid) or in solution

Question 38

What are the changes in the electrodes in electrolysis?

Answer 38

Positive & negative

Question 39

What happens in electrolysis?

Answer 39

Opposite charged ions are attracted to an electrode

Question 40

What can electrolysis be used for?

Answer 40

Electroplating jewellery, purifying copper, extracting aluminium

Question 41

Write the general word equation for the reaction of metal oxides with acid

Answer 41

Metal oxide + acid —> salt + water

Question 42

How would you separate an insoluble solid from a solution & then obtain crystals?

Answer 42

Filter the insoluble solid the leave the solution to evaporate leaving crystals behind