Science Quiz Answers Summary

Q1 Written Work 2

The core is a nickel-rich sphere. :Question 1Select one: a. Yes b. No

The Calvin cycle is another term for photosynthesis.Question 2Select one: True False

The Steady State Theory arose when? :Question 3Select one: a. 1940s b. 1950s c. 1970s d. 1960s

Why did iron sink towards the center of the earth?:Question 4Select one: a. Just because b. It was heavier. c. It's natural

Fluorescence is the fourth step in photosynthesis.Question 5Select one: True False

When was the universe and solar system formed? :Question 6Select one: a. 4.7 billion years ago b. 50 billion years ago c. 4.6 billion years ago d. 6.7 billion years ago

These are the two types of chlorophyll in plants.Question 7Select one: a. Chl a and Chl c b. Chl a and Chl b c. Chl b and Chl d d. Chl c and Chl b

The plasma theory observed that ____ of matter is made up of plasma.:Question 8Select one: a. 90% b. 80% c. 70% d. 99%

It was ________ who stated that the universe is still expanding :Question 9Select one: a. Edward Hubble b. C. Fred Hoyle c. Isaac Newton d. Albert Einstein

CH2O is the chemical name for whatQuestion 10Select one: a. Water b. Proteins c. Oxygen d. Carbohydrates

Let's break down the answers to these questions:

Question 1: The core is a nickel-rich sphere.

• Answer: a. Yes
  • The Earth's core is primarily composed of iron (Fe) with a significant amount of nickel (Ni).

Question 2: The Calvin cycle is another term for photosynthesis.

• Answer: False
  • The Calvin cycle is a specific part of photosynthesis, specifically the light-independent reactions where carbon dioxide is converted into sugars. Photosynthesis encompasses both light-dependent and light-independent reactions.

Question 3: The Steady State Theory arose when?

• Answer: d. 1960s
  • The Steady State Theory was a cosmological model popular in the 1940s and 1950s, but it was largely replaced by the Big Bang theory in the 1960s.

Question 4: Why did iron sink towards the center of the earth?

• Answer: b. It was heavier.
  • Iron is denser than the other elements that make up the Earth. During the Earth's formation, heavier elements like iron sank towards the center due to gravity.

Question 5: Fluorescence is the fourth step in photosynthesis.

• Answer: False
  • Fluorescence is not a step in photosynthesis. It's a phenomenon where certain molecules absorb light energy and then re-emit it at a longer wavelength.

Question 6: When was the universe and solar system formed?

• Answer: c. 4.6 billion years ago
  • The universe is estimated to be about 13.8 billion years old. Our solar system, including Earth, formed about 4.6 billion years ago.

Question 7: These are the two types of chlorophyll in plants.

• Answer: b. Chl a and Chl b
  • Chlorophyll a and chlorophyll b are the primary pigments involved in photosynthesis in plants.

Question 8: The plasma theory observed that ____ of matter is made up of plasma.

• Answer: d. 99%
  • Plasma is often referred to as the "fourth state of matter" after solid, liquid, and gas. It's a superheated, ionized gas, and it's estimated to make up about 99% of the visible matter in the universe.

Question 9: It was ________ who stated that the universe is still expanding.

• Answer: a. Edward Hubble
  • Edwin Hubble's observations of distant galaxies in the 1920s led to the discovery of the expanding universe.

Question 10: CH2O is the chemical name for what?

• Answer: d. Carbohydrates
  • CH2O is a simplified formula representing the basic building block of carbohydrates. It's not a specific carbohydrate itself, but it shows the ratio of carbon, hydrogen, and oxygen atoms found in carbohydrates.