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When is a Planet Not a Planet? Wonders G5 Unit 5: Weeks 1-2

Total questions: 13

Worksheet time: 13mins

Name
Class
Date
1.

Which word has the OPPOSITE meaning of the word approximately?

a)

almost

b)

exactly

c)

tightly

d)

often

2.

Which of these items would best help a person do a calculation?

a)

book

b)

computer

c)

paper

d)

scissors

3.

Diameter is the distance

a)

top to bottom.

b)

from side to side.

c)

around something.

d)

between two things.

4.

Something that is astronomical has to do with

a)

cooking.

b)

measurement.

c)

space.

d)

weight.

5.

What does the word orbit mean?

a)

to move away from another object

b)

to move around another object

c)

to bounce off another object

d)

to collide with another object

6.

What does the word spheres mean?

a)

round three-dimensional objects

b)

square three-dimensional objects

c)

triangular three-dimensional objects

d)

rectangular three-dimensional objects

7.

Read the dictionary entry below.

Noun 1. Rules used to measure 2. Set standards

Which of the following words is defined above?

a)

calculation

b)

criteria

c)

diameter

d)

spheres

8.

Which word has almost the same meaning as the word evaluate?

a)

anticipate

b)

judge

c)

organize

d)

structure

9.

What is the main difference between the planets in our solar system?

a)

The planets closest to the sun have a rocky surface and the planets farthest from the sun are made up mostly of gas.

b)

The planets farthest from the sun have a rocky surface and the planets closest to the sun are made up mostly of gas.

c)

The planets closest to the sun travel outside their own orbits, but the planets farthest from the Sun have their own orbits.

d)

The planets farthest from the sun travel outside their own orbits, but the planets closest to the Sun have their own orbits.

10.

Most scientists think the world began as a

a)

star.

b)

comet.

c)

planet.

d)

nebula.

11.

What finding made astronomers begin to doubt that Pluto was a planet?

a)

They discovered that it traveled around the Sun in an oval-shaped orbit.

b)

They found that although it was the farthest planet from the Sun, it had a rocky surface.

c)

They discovered that it had enough gravity to “clear the neighborhood” around its orbit.

d)

They found that although it was the farthest planet from the Sun, it was made up mostly of gas.

12.

According to the selection, what do the Planet Finders use to look for planets?

a)

a camera and a computer

b)

the Hubble Space Telescope

c)

a wide-field telescope and a camera

d)

the Hubble Space Telescope and a camera

13.

As defined by the IAU, what category of celestial bodies orbits the Sun, is round, and is not a moon or satellite of another planet?

a)

asteroids

b)

comets

c)

dwarf planets

d)

planets