Review SAJ SCIENCE

Which one is the correct order DNA structure from the innermost to the outermost?

• DNA-Genes-Chromosome-Nucleus-Cell

• Genes-DNA-Chromosome-Nucleus-Cell

• Cell-Nucleus-Chromosome-DNA-Genes

• Chromosome-Cell-Nucleus-DNA-Genes

which one is the example of composite material?

• Glass

• Polyethene

• PVC

• Paper

why small stone is used for making concrete?

• to make it strong

• to make it hard

• to mix them well

• to stick it

Acid rain is caused by ....

• Carbon monoxide

• Carbon dioxide

• Sulfur dioxide

• toxic substance

if the pivot is in the position like in the picture, the bar won't be balance. How to make the bar balance?

• move the pivot near to A

• move the pivot near to B

• move B near to pivot

Short-neck giraffe and long-neck giraffe used to live together. Nowadays, there is only long-neck giraffe. Why is it happen?

• short-neck giraffe get more food

• short-neck giraffe get less food

• long-neck giraffe get less food

• long-neck giraffe can't adapt well

the correct properties of ceramics is used in the laboratory is ....

• heat insulator

• hard

• brittle

• unreactive

what is the effect of too much carbon dioxide in the air?

• blacken the building

• global warming (climate change)

• biomagnification

• acid rain

If Mila can cycling for 600 m in 1 minute, the speed of Mila is ….

• 600 m/s

• 60 m/s

• 100 m/s

• 10 m/s

in an investigation, cause is ... variable

• independent

• dependent

• control

• same