SCIENCE REVIEW

1.    What does an ornithologist study?

• fish

• mammals

• birds

• amphibians

2. 2.    What is made by white blood cells to help fight off infection?

• water

• red blood cells

• plasma

• antibodies

  What vitamin does the sun’s ultraviolet rays help the skin produce?

• vitamin k

• vitamin D

• Vitamin A

• Vitamin B complex

    What is the name of the natural home or environment of an animal, plant, or other organism?

• habitats

• biosphere

• community

• population

. Bronze is an alloy of which two metals? 

• gold and silver

• iron and nickel

• copper and tin

• silicon and sodium

What is the smallest muscle in the human body?

• tonsils

• stapedius

• gluteus maximus

• keratin

What substance are nails made of?

• keratin

• cuticle

• fats

• amino acids

What is the human body’s largest organ?

• liver

• skin

• heart

• lungs

What does DNA stand for?

The food pipe is also known as __________