1. The penguin chicks cannot go into the water to get themselves own food until

A B
they have waterproof coats of feathers like their parents.
C D
2. Balloons rise into their air because they contain a gas who is less dense, or
A B C
lighter than air.
D
3. The narwhal is the only animal in the world that has a tusk on only one side
A B C
of it body
D
4. Silver is too soft to use by itself, so it is mixed with another metal to make themselves
A B C D
harder.
5. Most slugs and snail breath using a lung which opens through a small hole in the side of
A B C
it bodies.
D
6. Every fuel has their own particular temperature at which it begins to burn.
A B C D
7. Harriet Tubman, she an escaped slave, led more than three hundred slaves to freedom on
A B C
the Underground Railroad.
D
8. Dreaming, like all other mental processes, it is a product of the brain and its activity.
A B C D
9. Snails produce a colorless, sticky discharge that forms a protective carpet under them as
A B C
their travel along.
D
10. George Washington Carver won international fame for his agricultural research,
A B
who involved extensive work with peanuts.

1. The penguin chicks cannot go into the water to get themselves own food until