Planets and other objects in the solar system
Grade 6 Science Worksheet - Building Confidence
Circle the best answer.
Ari reads the lettered orbit diagram for a space club poster. Which letter marks the asteroid belt?
- F
- C
- D
- E
Which letter on the orbit diagram marks a comet, Bo?
Use the picture in question 1.
- B
- C
- A
- F
In the diagram, object D has many small dots circling it. What are those dots, Esme?
Use the picture in question 1.
- Comets, since they are icy
- Moons orbiting the planet
- Small planets orbiting the Sun
- Stars inside the planet's clouds
Kira sorts planet cards for a poster. Which pair are both gas giants?
- Mars and Jupiter
- Uranus and Neptune
- Jupiter and Saturn
- Venus and Saturn
Read this first
Use this
Data table (NASA Planetary Fact Sheet, 2025), columns Planet, Diameter (km), Moons and Rings. Mercury: 4,879, 0, no. Venus: 12,104, 0, no. Earth: 12,756, 1, no. Mars: 6,792, 2, no.
Using the inner-planet table, which planets have no moons, Milo?
- Just Mars
- Mercury and Venus
- Earth and Mars
- Venus and Earth
Noah checks the inner-planet table. How many moons does Mars have?
- 2
- 0
- 1
- 4
Pia needs the smallest ball for a model of the inner planets. Using the table, which planet is smallest across?
- Venus, at 12,104 km
- Mercury, at 4,879 km
- Mars, at 6,792 km
- Earth, at 12,756 km
A space rock the size of a pebble is still drifting through space. What is it called, Ren?
- A meteoroid
- A meteor
- A dwarf planet
- A meteorite
Tala reads about a bright streak of light as a space rock races into the air and burns up. What is the streak called?
- A meteor
- A meteorite
- A meteoroid
- A star falling to Earth
A space rock survives its trip through the air and lands in a farm field (the cows are unimpressed). What is it called now, Zee?
- A meteorite
- A meteor
- A comet
- A meteoroid