Choose the correct answer. ( All Mix)

1. 1.Earth is about .......... billion years old.

• 4.7

• 4.6

• 4.5

2.On average, how long does it take to make a fossil?

• 100yrs

• 1000yrs

• 10000yrs

The function of ..................... is to stop of bleeding .

A ............. is a measure of energy.

Woodlice have an outer shell called an ..........

Animals attached to flowers by a sweet substance called............

....................... study the composition of matter and its properties .

On a space , everything inside it appears to be................

Mosses and ferns do not have .......................

What is it?

• open switch

• close switch

• switch off