Sci Grade 8, Matlock, Ch. 7 Test

Front

What is scientific notation?

Back

A way of expressing numbers that are too large or too small to be conveniently written in decimal form, using powers of ten.

Front

Convert 0.000000162 to scientific notation.

Back

1.62 ⋅ 10−7

Front

What is the expanded form of 2.756892 ⋅ 10^{11}?

Back

275,689,200,000

Front

What is the best spacecraft to observe the atmosphere of a nearby planet?

Back

An Orbiter Probe.

Front

What force binds all matter together in a galaxy?

Back

Gravity.

Front

During the Big Bang, were equal parts of matter and antimatter created?

Back

No.

Front

What is gravity?

Back

A force that attracts two bodies towards each other, proportional to their masses and inversely proportional to the square of the distance between them.

Front

What is dark matter?

Back

A form of matter that does not emit light or energy, making it invisible and detectable only through its gravitational effects.

Front

What is dark energy?

Back

A mysterious force that is causing the acceleration of the universe's expansion.

Front

What is an orbiter probe?

Back

A spacecraft designed to go into orbit around a celestial body to study it from a distance.