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Flashcards in JJ's Extra Questions Deck (15):
1

What is a Solar Eclipse?

Where the moon passes directly between us and the Sun.

2

What is a Lunar Eclipse?

Full moon in Earth's shadow.

3

Explain the Retrograde Motion of Outer Planets?

Venus, Uranus and Pluto rotate Westward.

4

What are the 4 Fundamental Forces?

Gravitation, electromagnetism, weak interaction, strong interaction.

5

What is the Order of the Light Spectrum?

Gamma rays, X rays, UV, VBGYOR, infrared, microwaves, radio waves.

6

What does the Absorption Spectrum tell us?

Which light is absorbed.

7

What does the Emission Spectrum tell us?

Which light is emitted.

8

Why was Astronomy Important in Ancient Times?

For seasons and farming.

9

What was One Point Against a Stationary Earth?

Retrograde motion couldn't be explained.

10

What are the 6 Steps of the Scientific Method?

Observe, question, hypothesis, experiment, analysis, conclude.

11

What is Copernicus' Heliocentrism?

Sun at centre of universe with other planets orbiting at uniform speeds.

12

What is a Major Inaccuracy with Spaceflight in Movies?

You can't do banking in space.

13

Explain Time Dilation?

Light speed is the same, increased distance = increased time, clock moves slower when viewed by a frame of reference that is not in motion with it.

14

How does Solar Wind Create an Aurora?

Charged particles from the Sun hit Earth atoms, charging electrons. Electrons return to lower energy state and emit a photon.

15

What is the Solar Nebula Hypothesis?

Planets form at the same time from the same cloud as the star.