Sci Grade 8, Matlock, Ch. 7 Test

Front

What is parallax?

Back

Parallax is the apparent change in position of an object when viewed from different locations.

Front

Which type of stars tend to be brighter?

Back

Larger and hotter stars tend to be brighter, while smaller and cooler stars tend to be dimmer.

Front

What is the force that binds all matter together in a galaxy?

Back

Gravity is the force that binds all matter together in a galaxy.

Front

What is scientific notation?

Back

Scientific notation is a way of expressing numbers that are too large or too small to be conveniently written in decimal form.

Front

Convert 0.000000162 to scientific notation.

Back

1.62 × 10⁻⁷.

Front

How many figures are in the number 230,900,000?

Back

There are 4 figures in the number 230,900,000.

Front

What is the difference between dark energy and dark matter?

Back

Dark energy is a mysterious force that is causing the acceleration of the universe's expansion, while dark matter is a form of matter that does not emit light or energy, making it invisible and detectable only through its gravitational effects.

Front

What is the role of gravity in the universe?

Back

Gravity is the force that attracts two bodies towards each other, playing a crucial role in the formation and structure of galaxies, stars, and planets.

Front

What is a reflecting telescope?

Back

A reflecting telescope uses mirrors to gather and focus light to observe distant objects.

Front

What is a refracting telescope?

Back

A refracting telescope uses lenses to bend and focus light to observe distant objects.