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which group are fossils never found?

igneous

metamorphic

sedimentary

igneous

in which part of a plant will you find this type of cell

stem

root

flower

leaf

leaf

The post breaks off and falls on the ground as shown.

 The weight of the broken post is 120 N.

The area in contact with the ground is 0.2 metres squared.

Calculate the pressure of the broken post on the ground.

600Nm2

.  Iron can be produced from a mixture of aluminium and iron oxide but not from a mixture of copper and iron oxide.
Write the names of the three metals, in the order of their reactivity from the most to least reactive

iron,aluminium,copper

the image shows the names and symbols of five metals in order of their reactivity what if anything ,would be the result of heating zinc powder with calcium oxide

reaction takes the place making calcium carbonate

what is:

independant variable

control variable

dependent variable

independent is changed

control is the sane

dependant is measured or observed.

There are millions of alveoli in the lungs. They provide a very large surface area. Why is a large surface area necessary?

so that lots of oxygen can be absorbed from the air we breathe out

so that lots of oxygen can be absorbed from the air we breathe in

so that lots of carbon dioxide can be absorbed from the air we breathe in

 

so the blood cells can pass through the lungs easily

so that lots of oxygen can be absorbed from the air we breathe in