Tiny Science

Question 1

What is the atmosphere closest to the earth and how big is it in km?

Answer 1

Troposphere

10km

Question 2

Gases in atmosphere and percentages

Answer 2

Other=1%
Carbon dioxide= 0.04%
Oxygen=21%
Nitrogen=78%

Question 3

The atmosphere is a ______of ________

Answer 3

Mixture

Gases

Question 4

In the crust most rocks are ________of ________

Answer 4

Mixtures

Compounds

Question 5

How can we learn about the structure of the earth?

Answer 5

Use shockwaves from earthquake
Examine rocks on surface and i oceans
Materials that volcanoes bring to the surface

Question 6

Structure of earth

Answer 6

Crust
Mantle
Outer core
Inner core

Question 7

How thick is the crust

Answer 7

8km-40km

Question 8

What state is the mantle in and what does it do that moves tech tonic plates

Answer 8

Mostly solid rock but it can flow

Convection currents

Question 9

What is the core made out of

Answer 9

Iron and nickel

Question 10

The state of the outer core

Answer 10

Liquid

Question 11

State of inner core

Answer 11

Solid

Question 12

What is the carbon cycle

Answer 12

It shows how carbon enters and leaves the atmosphere

It shows how carbon dioxide and its compounds enter and leave carbon stores

Question 13

List of carbon stores

Answer 13

The atmosphere
Oceans containing dissolved carbon dioxide
Sedimentary rocks that contain carbonate and calcium
Fossil fuels such as coal oil natural gases
Plants animals and soil

Question 14

What gives out carbon into the atmosphere

Answer 14

Respiration and combustion

Question 15

Word equation for respiration

Answer 15

Glucose +oxygen -> carbon dioxide +water

Question 16

Word equation for combustion

Answer 16

Methane +oxygen -> carbon dioxide +water

Question 17

What takes in carbon dioxide from the atmosphere

Answer 17

Photosynthesis and dissolving

Question 18

Word equation for photosynthesis

Answer 18

Carbon dioxide +water ——-> glucose +oxygen. Light

Question 19

What is climate change

Answer 19

A long term change in weather patterns

Question 20

Impacts of global warming

Answer 20

Melting ice
Flooding
Droughts 
Rainfall heavy
Heat waves

Question 21

By _____ globe increase by ____

Answer 21

2100

5%

Question 22

Since __ more ___ enters the atmosphere

Answer 22

1800

Carbon dioxide

Question 23

Cause of global warming

Answer 23

Burning fossil fuels to generate electricity

Cutting down forests deforestation to make room

Question 24

If there was no carbon dioxide in the atmosphere earth would be

Answer 24

Too cold for life

Question 25

What does recycling mean

Answer 25

Means collecting and processing materials | Do materials can be used again

Question 26

Recycling paper -> Recycling bottles -> Recycling aluminium cans->

Answer 26

Paper Fleeces Aluminium sheets-> cans

Question 27

Order of recycling

Answer 27

``` Lory Factory Shredded Decoration removed Furnace melts shreds Cools and freezes Aluminium ingot Heated to 600•c Rollers flattern Sheets -> new cans ```

Question 28

Advantages of recycling

Answer 28

Resources last longer Less energy than new materials Reduces waste pollution Extracting metals from ore creates red mud waste

Question 29

Disadvantage of recycling

Answer 29

Separating rubbish is a nuisance | Lorries that collect recycling uses fuel and creates pollution

Question 30

Where do the positively charged metals go

Answer 30

To the negative cathode where it gains more electrons to become neural

Question 31

Where do negatively charged ions go

Answer 31

To the positive anode to loose electrons to become neural

Question 32

What is electrolyte

Answer 32

Liquid that conducts electricity

Question 33

What is an anode

Answer 33

Positive electrode

Question 34

What is a cathode

Answer 34

Negative electrode

Question 35

What is an ion

Answer 35

An atom with a charge

Question 36

What is electrolysis

Answer 36

Splitting up a compound using electricity

Question 37

What is an ore

Answer 37

A rock that you can extract a metal from

Question 38

Iron oxide is

Answer 38

Iron + oxygen

Question 39

What is extracting metals

Answer 39

Using chemical reactions to extract iron from iron oxide

Question 40

What happens to the metals below carbon

Answer 40

Use carbon to extract metals

Question 41

What happens to metals above carbon

Answer 41

Uses electrolysis to extract metals

Question 42

Carbon + copper oxide

Answer 42

-> copper + carbon dioxide

Question 43

What is a symbol equation for extracting metals

Answer 43

C+2CuO-> 2Cu+CO2

Question 44

Why is gold not found as an ore

Answer 44

It is unreactive to oxygen