OD4

vocabulary-1

100

very big

vast

200

the central part of an object

core

300

a kind of heavy earth that becomes hard when it is dry

clay

400

a very large group of stars and planets

galaxy

500

a person who studies or knows a lot about the sun, moon, planets and stars

astronomer

vocabulary-2

100

a large group of soldiers who fight on land in a war

army

200

a place that is often underground where a dead person's body is buried

tomb

300

the path of a planet or an object that is moving around another thing in space

orbit

400

metal clothes that people wore long ago to cover their bodies when they were fighting

armor

500

a person who studies the past by looking at objects or parts of buildings that are found in the ground

archaeologist

Grammar-1

100

we use _______ to make a prediction. A prediction is something you believe about the future. A prediction is not a fact. 

will

200

Some verbs are often followed by an infinitive. An infinitive is a verb with the word _____ in front of it. 

to

300

We use the future real conditional to talk about a future possibility and what will happen as a result of it. Use the word _______ with a future possibility.

if

400

result or future possibility

If I become an astronaut, I will walk on the surface of Mars.

result: I will walk on the surface of Mars

possibility: If I become an astronaut

500

mistake hunting and write down the correct answer~

All the students promised studying hard for the English test.

mistake: studying 

correct answer: to study

Mix questions-1

100

Fact or Prediction

Scientists will send a person to Mars someday.

Prediction

200

compare / contrast

1) talk about how things are alike 

2) talk about how things are different

1) compare

2) contrast

300

Largest to smallest

1) universe / galaxy / solar system / moon / meteorite

2) solar system / universe / galaxy / moon / meteorite

3) solar system / galaxy / universe / meteorite / moon

1) universe / galaxy / solar system / moon / meteorite

400

persuade / inform / entertain

We should not sell old treasure that we find. We should display it in museums. The history of the world belongs to its people.

to persuade

500

Things to wear~

clay / jade / armor / soldiers / archaeologist / uniforms / peasant

armor / uniforms

Mix questions-2

100

Mercury and our moon both have craters.

True

200

Every terra-cotta soldier looks exactly the same. 

false

300

Varnish is a box that a dead body is put into. 

False / coffin

400

how much / how many

1) ______ water is on Jupiter?

2) ______ planets are in our solar system?

1) how much

2) how many

500

unscramble the sentence

will / ground / meteorite / hit / small / the / tonight

Small meteorites will hit the ground tonight.