1) Gravity is a _______________ force. a) push b) pull 2) Gravity pulls objects towards the _________________________. a) surface of the Earth b) centre of the Earth c) top of the Earth 3) Who introduced the theory of gravity? a) Sir David Attenborough b) Albert Einstein c) Steven Hawking d) Sir Isaac Newton 4) The greater an object's mass, the _________________ the gravitational pull of the Earth. a) weaker b) stronger 5) The lower an object's mass, the _________________ the gravitational pull of the Earth. a) weaker b) stronger 6) Gravity acts at a distance. a) True b) False 7) Gravity requires contact. a) True b) False

Gravity retrieval!

列印
嵌入

排行榜

視覺風格

選項

切換範本

恢復自動保存: ?