Quiz Unit 1

The age of the universe is [select all that apply!] A. 13,800,000,000 years old. B. 13.8 billion years old. C. 13.8 million years old. D. 13,800,000 years old. .

A, B 13.8 billion years is 13,800,000,000 years

Edwin Hubble made many contributions to space science. Which of the following number among his noteworthy contributions [select all that apply]? A. Developing a way to measure distances in space B. Proving that the universe is expanding C. Showing that the Sun does not revolve around the Earth D. Discovering the Helios Delta star system E. Showing that there are multiple galaxies in the universe

A, B, E

Our galaxy is A. A spiral galaxy B. an elliptical galaxy C. an irregular galaxy D. a barred galaxy

A. A spiral galaxy

When Sun eventually runs out of hydrogen fuel, it will likely next become a A. Red Giant B. Black hole C. Blue Dwarf D. Red Dwarf

A. Red Giant

If we want to see what the Sun would have looked like at its formation, we can look at A. T Tauri Stars B. Pulsars C. Neutron stars D. White Dwarf stars

A. T Tauri Stars

Hypothetically, if the universe was spherical in shape, it would be [select all answers that apply!]: A. a "closed" system B. infinite in size C. an "open" system D. finite in size

A. a "closed" system, D. finite in size

Our closest neighbouring spiral galaxy is the ________________ Galaxy.

Andromeda

Which of the following statements is true? A. The luminosity ("intrinsic brightness") of stars decreases with distance from the observer. B. The difference between the measured ("apparent") brightness of a star and its intrinsic brightness allows you to calculate its distance. C. Stars that are further away always appear more dim than closer stars. D. The "colour" of a star is related to its distance.

B Be careful not to confuse 'apparent brightness' and 'intrinsic brightness', or luminosity. As an analogy, intrinsic brightness is like the 100 watt rating on a light bulb: wherever you stand in the room, the light bulb is still a 100W bulb. But, the apparent brightness (the light that actually enters your eye) is smaller when you stand further away. A dim light could be a 100W bulb viewed from afar, or it could be a close-by 20W bulb. If we know (from its colour) that it's a 100W bulb, then we can figure out how far away it must be.

Which of the following is true (select ALL true answers!) A. "Blue Shift" light is emitted by a body that is receding from the observer B. Infrared light has a lower frequency than ultraviolet light C. A seagull flying towards a foghorn hears a higher pitched foghorn blast than one flying away

B, C

Which of the following is not one of the Three Pillars of Proof for the Big Bang Theory? A. The abundance of light elements B. Binary star systems C. Cosmic Microwave Background characteristics D. Recession of stars

B. Binary star systems

The Orion Arm is part of which local group galaxy? A. Andromeda B. Milky Way C. Triangulum

B. Milky Way

The reason there are usually more clouds in the sky rather than on the ground is because A. We just don't "see" the clouds on the ground because we're at the same level. B. There is more water vapour higher in the atmosphere C. The air is thinner higher in the atmosphere D. The temperature is cooler higher in the atmosphere

D. The temperature is cooler higher in the atmosphere

A light-year is the length of time it takes light to travel from Earth to the Sun. True False

False

Northern lights (aurora borealis) are a result of Earth's interaction with Moon's gravitational pull. -True -False

False - The northern lights are caused by charged particles entering the Earth's atmosphere!

An ion has an equal number of protons and electrons. -True -False

False- An ion can be positive or negative. A positive ion has fewer electrons than protons, and a negative ion has a greater number of electrons than protons.

An substance that cannot be broken down to anything simpler by chemical means is called a(n) ____________ .

element

An educated guess, based on observation is called a(n) ______________- .

hypothesis

When discussing the true brightness of a star, we refer to its ______________ brightness.

intrinsic

Isotopes are atoms of the same element that have different numbers of ______________ .

neutrons