Hard Crossword puzzle 8G Rocks and Weathering

The BIG KS3 Science-Chemistry crossword on "Rocks and weathering"

Across:
1	Acidic rain causes this kind of weathering. (8)
4	Sometimes contains fossil 'swampy' trees and giant ferns. (4)
8	A word meaning the small particles that make up rocks. (6)
9	From lake or river deposition and a bit difficult to make pies out of this rock! (8)
10	Small chunks of rock in lakes and river beds. (6)
12	Part of this is fine weathered rock grains. (4)
13	It means moving the broken down rocks. (14)
15	Salt lakes were formed by (10)? soluble rock materials.
16	This rock is made from quite a collection of mud and rock debris compressed together. (12)
18	Your (11)? is all around you, hopefully with no pollution!
19	The main transporter of weathered rock. (5)
21	This happens to salt lakes to make 'rock salt'. (11)
23	The breaking down of rocks to making a new shape. (7)
24	Plant roots cause this type of erosion. (10)
26	This rock is formed from deposits in seas and estuaries. (9)
27	A word meaning the 'attacking' of rock causing erosion. (10)
29	This rock description tells you it will readily absorb water. (6)
32	Rocks do this in the sun, but does water? (6)
33	These sort of 'remains' of plants and animals make limestone. (6)
34	The fine particles in muddy water are often made of this, but when deposited can be turned into fine pots! (4)
35	A word meaning 'being laid down' e.g. rock grains. (9)

Down:
2	Rocks do this on cooling. (8)
3	These kind of rock grains settle out first and are not transported as far as smaller ones! (6)
4	A sedimentary rock that burns well, but polluting! (4)
5	Formed from deposits of the hard mineral remains of sea organisms. (9)
6	Ice formation and the sun cause this type of weathering. (8)
7	This type of rock grain travels further in water and sinks more slowly than big ones! (7)
11	This kind of rain produces the quickest erosion, beware limestone, though you don't see it fizzing because its very slow! (6)
14	The name of the process where bits of rock settle down! (13)
17	When water is doing this state change, it can split rocks. (8)
20	Glaciers produce this friction effect on rocks, sand paper has the same effect on wood. (8)
22	We were once living things, but now we are just traces in rocks! (7)
25	Rocks expand when (6)?
28	Rocks contract when (6)?
30	Type of rock formed from fine mud particles and remains of sea creatures compressed together and sometimes contain absobed oil. (5)
31	Nice to lay on in the sun, when the weathering of the rock stops and the weather is fine! (4)