Distance + Universe
What unit measures the distance light travels in one year?
What is a Light Year (LY)
A star’s color tells you its ________.
What is
A star’s color tells you its ________.
Earth’s seasons are mainly caused by Earth’s ________.
What is
Tilt (of Earth’s axis)
What happens to gravity when an object’s mass increases?
What is
gravity increases (greater mass the greater the gravitational force)
Which model is Sun-centered?
What is
Heliocentric
Put these in order from smallest to largest: Universe, Galaxy, Solar System.
What is
Solar System → Galaxy → Universe
Apparent magnitude describes brightness as seen from ________.
What is
Earth/ the observer on Earth
What causes most ocean tides on Earth?
What is
The Moon’s gravity
What happens to gravity when the distance between two objects increases?
What is
Gravity decreases
What is the only part of the electromagnetic spectrum humans can see?
What is
Visible light
True/False: The universe contains many billions of galaxies, and each galaxy contains many billions of stars.
What is True
Which color star is typically hottest: red or blue?
What is
Blue
Name two ways the Moon impacts Earth
What is
Phases, tides, eclipses
What “predictable pattern” do planets follow as they move through space, controlled by gravity?
What is
Orbit
which electromagnetic radiation has the longest wavelength?
radio waves
A star is 4.2 light-years away. How long did its light take to reach Earth?
What is
About 4.2 years
What solar feature appears as dark spots because they are cooler than surrounding areas?
What is
Sunspots
Name 2 challenges in space exploration
What is
Extreme temperature, no oxygen, no gravity to support human bones, harmful radiation
Object resistance to a change in motion is called _______
What is
inertia
Stars emit a wide range of visible light, which is why they appear _____
What is
white
Convert: 1 parsec equals about ________ light-years.
What is
3.26 light-years
Explain the difference: absolute magnitude vs apparent magnitude.
What is
Apparent = how bright it looks from Earth;
Absolute = actual brightness without distance
What is
Data collection and observation
Gravity compress the protostar until temperature and pressure are high enough to cause _____
What is
Nuclear fusion
The light from the electromagnetic spectrum travels through a _______
What is
Vaccuum or Space or No medium