Chemical Reactions

Question 1

Chemical reaction

Answer 1

Where atoms in a substance are rearranged to from a different substance

Question 2

3 examples of how u can tell when a chemical reaction is happening

Answer 2

Fizzing, bubbles, smoke

Question 3

What do chemical reactions transfer

Answer 3

Chemical reactions transfer energy from the surroundings

Question 4

Physical change

Answer 4

When an appearance changes but the chemical structure doesn’t

Question 5

What Happens to the mass in a chemical reaction

Answer 5

Maths is never gained or lost

Question 6

What happens the atoms in a chemical reaction?

Answer 6

They are rearranged into different compounds, however no new atoms are created or are lost

Question 7

Endothermic

Answer 7

Heat enters

Question 8

Exothermic

Answer 8

Heat exits

Question 9

Catalysts

Answer 9

The speed up chemical reaction, but arent actually used in the chemical reaction

Question 10

What type of weathering is acid rain? And give a summary.

Answer 10

Chemical , then make rain more acidic, the rain dissolve quicker on a rock

Question 11

What type of weathering is rain? And give a summary.

Answer 11

Chemical CO2 from the air dissolves and rainwater, making the rain slightly more acidic rain, then reacts of the rocks causing them to dissolve

Question 12

What type of weathering is freeze-thaw weathering? And give a summary.

Answer 12

Physical the water gets into the cracks and turns into ice, making the crack wider and eventually breaking the rock

Question 13

What type of weathering is wave action?

Answer 13

Physical the wave crashing into the road, causing what to wear away

Question 14

What type of weathering is glaciers?

Answer 14

Physical places are huge, the lives of ice that struck the rock when they move across them

Question 15

What type of weathering is flowing water

Answer 15

Physical flowing water, scrapes the rocks when going down a bath, flowing stream and riverbed

Question 16

What type of weathering is onion skin weathering?

Answer 16

Physical rock expands because it’s really hot in the day over time. The shop is the surface of the rock because of the contract at night.

Question 17

What type of weathering is moss & Lichen

Answer 17

Biological moss and littering rows on the surface of the rocks wearing them away slowly

Question 18

What time the weather is animal activity?

Answer 18

Biological the movement of animals across the rocks especially with hooves, causes the rock to break off pieces and wear away

Question 19

What type of weathering is tree roots?

Answer 19

Biological tree roots can force the way very slowly between stones and rocks, causing destructive effects

Question 20

Fire triangle

Answer 20

⬇️= fuel
↙️=heat
↘️=oxygen

Question 21

Combustion, meaning

Answer 21

The chemical process in which a substance reacts properly with oxygen & gives off heat

Question 22

Metal oxide, meaning

Answer 22

The product formed when a metal reacts with oxygen

Question 23

Oxidation meaning

Answer 23

The addiction of oxygen to an element and the loss of electrons

Question 24

Rust, meaning

Answer 24

Orange/no brownish solid that forms on metal and flakes of easily