stage 7 - science vocabulary quiz

The form of energy released when an atom decays is called

The process of species change is called

Fossils formed by the things left behind such as eggs solid wastes and tracks are known as

• rocks

• sediments

• trace fossils

• index fossils

Soil made of 40% sand, 40% silt and 20% clay is called a

The pH of a soil is a measure of how _______________ or _____________ the soil is

The word texture means

As the remains of the plants and animals rot they form a subsatnce called _________________

• garbage

• humus

• topsoil

• subsoil

The process in which rock breaks up to form fragments is called ___________________

Rocks that possess large quantities of metal compounds are called ____________

• ores

• alloy

• minerals

• gemstones

The Earth is divided into three regions such as ________, __________ and _____________