Question

1. astronomers break starlight into a spectrum using a ______.
2. astronomers struggle to locate black holes because ______.
3. the motion of stars around the center of the milky way shows ______.

section 6 — fusion, energy & true/false
word bank: hydrogen, true, false

1. when ______ atoms fuse into helium, the missing mass becomes heat and light.
2. when energy and matter are paired with light, they are one in the same. (______)
3. gravity makes a nebula more stable in a newly - formed star. (______)
4. all objects emit and absorb electromagnetic radiation. (______)
5. if someone waited long enough, they could map every constellation from one location. (______)

Explanation:

Step1: Identify Q42 tool for star spectra

Astronomers use a spectrograph to split starlight into a spectrum.

Step2: Identify Q43 black hole property

Black holes do not emit light, making them hard to find.

Step3: Identify Q44 Milky Way center observation

The orbital motion of central stars proves a supermassive black hole exists there.

Step4: Confirm Q45 fusion fuel

Hydrogen is the fusing atom for helium in stars.

Step5: Evaluate Q46 mass-energy equivalence

Energy and matter are interchangeable (E=mc²), not identical.

Step6: Evaluate Q47 nebula stability

Gravity collapses nebulae to form stable stars.

Step7: Evaluate Q48 electromagnetic radiation

All objects above 0K emit/absorb EM radiation.

Step8: Evaluate Q49 constellation visibility

Earth's position blocks some constellations from one location.

Answer:

1. spectrograph
2. black holes do not emit light
3. a supermassive black hole exists at its core
4. hydrogen
5. False
6. True
7. True
8. False