Exploring vocabulary - Muschla Gary R. 2012

Your blood
Science words

Science is knowledge gained from observation and experimentation and arranged in an ordered system.

1. astronomer (n): a person who studies space and the heavenly bodies

An astronomer uses a telescope to study the planets.

2. predator (n): an animal that hunts other animals for food

A lion is a predator.

3. element (n): A substance that has only one kind of atom

Oxygen is a common element on earth.

4. atom (n): the smallest part of an element that has all the characteristics of the element

An atom is far too small to see with the naked eye.

5. astronaut (n): a person who travels in space; a space explorer

Neil Armstrong was the first astronaut to walk on the moon.

6. prey (n): an animal that is hunted by other animals for food

The hawk soared over the field, looking for prey.

7. molecule (n): the smallest part of a substance formed by two or more atoms

Hydrogen and oxygen combine to form a molecule of water.

8. atmosphere (n): the air that surrounds the earth

The earth’s atmosphere is made up of many gases.

9. weather (n): the state of the atmosphere at a given time

The weather is sunny and pleasant.

10. climate (n): the kind of weather a place has over a long period of time

Countries near the equator have a hot climate.

Vocabulary tip

Science words help us to describe the world.

36.1 Your blood

Your blood carries oxygen and nutrients to the cells of your body, and it carries waste products from your cells. How much blood does your body contain?

To answer the question, find the word for each definition below. Choose your answers from the words that follow the definitions. Write the letter of each answer in the space above its definition number at the bottom of the page. You will need to divide the letters into words. Some letters are provided.

1. the smallest part of a substance formed by two or more atoms _____

2. a person who studies space and the heavenly bodies _____

3. the kind of weather a place has over a long period of time _____

4. an animal that is hunted by other animals for food _____

5. the state of the atmosphere at a given time _____

6. an animal that hunts other animals for food _____

7. the smallest part of an element that has all the characteristics of the element _____

8. the air that surrounds the earth _____

9. a substance that has only one kind of atom _____

10. a person who travels in space; a space explorer _____

Answers

N. predator

P. astronaut

B. atmosphere

I. prey

H. astronomer

U. climate

G. atom

E. molecule

T. element

A. weather