How to build a time machine

Time travel is most definitely based on ......

• art.

• geography.

• science.

• literature.

Einstein wrote that if you want to ............ time, you need to move very, very fast.

A spaceship that is escaping the Earth’s atmosphere is only going at ........................

• 10 kilometers every minute.

• 10 kilometers every second.

• 10 kilometers every hour.

If Einstein was right about time dilation, why could we still not travel forward in time?

• The speed of light is unpredictable, and there's no way of knowing how fast it is.

• The earth's gravitational pull keeps us stuck too close to it.

• It would take a huge amount of speed that our bodies can't handle.

What did Newton discover?

• Mass relates to time.

• Mass relates to gravity.

• Mass relates to light.

What is gravity?

• The amount of matter that an object has

• The force that attracts a body towards the centre of the earth.

• Enlargement.

According to Newton, all objects ............. each other due to gravity.

• connect

• attract

• push

How did Newton and Einstein help progress our understanding of space and time?

• Newton calculated time, and Einstein figured out that gravity is related to mass.

• Newton concentrated on the speed of light while Einstein studied the mass of the sun.

• Newton figured out that mass relates to gravity, and Einstein figured out that gravity relates to time.

Tipler claimed ......... could actually let you travel back in time.

• a cylinder

• a spaceship

Tipler designed a machine that could create enough gravitational waves to send someone back in time, .................................................

• but the machine would be crazy huge and flatten a person.

• but the machine would be very incredibly fast.