Science Category Review

The following picture is the Horsehead Nebula and is located about 1,500 light years from Earth in the constellation Orion. What is most likely occurring in the Horsehead Nebula?

• new star formation 

• formation of black holes 

• star explosions like supernovas 

• the birth of new galaxies 

Tags

NGSS.HS-ESS1-3

Use this model of the Hertzsprung-Russell diagram to answer question.
An astronomer discovers a new star that is very hot, but not very bright. What type of star did she discover?

• a red giant
  

• a young star on the main sequence 

• an old star on the main sequence 

• a white dwarf 

Our Sun is a middle-aged star with an average temperature and brightness. What type of star is our Sun according to the Hertzburg-Russell diagram?

• a white dwarf
  

• a red giant
  

• a star on the upper left portion on the main sequence 

• a star in the middle of the main sequence 

As a normal, averaged-size star progresses through its life cycle, what change will it undergo?

• it becomes cooler
  

• it gets smaller
  

• it becomes brighter 

• its gravity increases 

Tags

NGSS.HS-ESS1-3

What is the role of evidence in modifying scientific theories?

• Evidence is rarely considered when modifying theories.

• Evidence can refute or support theories, leading to modifications.

• Theories are modified first, then evidence is found to support the changes.

• Evidence is only used to confirm existing theories, not modify them.

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DOK Level 3: Strategic Thinking

🌟 Pop Quiz Time! 🌟 Can you guess what the atomic number of an element tells us?

• The number of protons in the nucleus

• The total number of protons and neutrons in the nucleus

• The number of electrons whizzing around the nucleus

• The total mass of the atom

Answer explanation

The atomic number of an element tells us the number of protons in the nucleus, which is the correct choice.

Which of the following best defines science?

• A collection of unchangeable facts about the natural world

• The study of the natural world through observation, identification, description, experimental investigation, and theoretical explanations

• A belief system based on assumptions about the natural world

• A method for proving theories beyond doubt

Tags

DOK Level 1: Recall

Which of the following is an example of a chemical property of matter?

• Density

• Reactivity with vinegar

• Mass

• Volume

Tags

DOK Level 3: Strategic Thinking

What is the first step of the Scientific Method?

• Formulating a hypothesis

• Conducting an experiment

• Making an observation

• Analyzing the data

Hey there, super scientist! Can you spot which element hangs out in Group 2 and rocks out in Period 3 of the periodic table?

• Sodium (Na)

• Magnesium (Mg)

• Aluminum (Al)

• Silicon (Si)

Answer explanation

The correct element is Magnesium (Mg) as it belongs to Group 2 and Period 3 of the periodic table.