Day 1 - 8th Science STAAR Review

Which of the following statements best describes the subatomic particle at location X? 

• It has a very large mass and is negatively charged. 
• It has almost no mass and no charge. 
• The charge of the subatomic particle at location x is opposite of the charge at location y. 
• It has a positive charge similar to location y. 

Tags

NGSS.MS-PS1-1

 How does the mass of location y compare to the mass at location x? 

• Location y has a mass multiple thousand times larger than location x. 
• Location y has a mass only slightly larger than location x. 
• Location x and y have the same mass.
  
• Location x has a mass twice as large as location y. 

Tags

NGSS.HS-PS2-4

 What are the names of the two subatomic particles located at y? 

• protons and electrons 
• neutrons and protons 
• neutrons and electrons 
• protons and neutrinos 

Tags

NGSS.MS-PS1-1

Which of the particle in the chart below is a neutron?

• Particle A
  
• Particle B
  
• Particle C
  
• None of the above 

Sara creates a chemical reaction between sodium and chlorine. How many valence electrons are transferred between the two atoms in the model below? 

• 1 electron 
• 2 electrons 
• 3 electrons 
• 4 electrons 

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

In question 5, what identifies the atom on the left as sodium (Na)? 

• Sodium always has an equal balance of neutrons and electrons. 
• No other atom can have only one valence electron. 
• Only sodium can chemically react and bind with chlorine. 
• Sodium is the only element with 11 protons. 

Tags

NGSS.MS-PS1-1

Which of these atoms will be more reactive and why? 

• Atom A, because it has fewer electrons.
  
• Atom A, because it has unequal charges.
  
• Atom B, because it gives up a valence electron. 
• Atom B, because it more neutrons. 

Tags

NGSS.MS-PS1-1

Michael eats a cookie at lunch. Which of the following actions during the digestive process is a chemical change? 

• Michael chewing the cookie before swallowing. 
• Enzymes in Michael’s saliva breaking down the sugar compounds. 
• Michael abdominal muscles pushing the cookie through the small intestines. 
• Small amounts of water being absorbed from the cookie in the large intestine. 

Tags

NGSS.MS-LS1-7

Miriam is investigating the reaction between magnesium metal with oxygen in the laboratory. What safety issues should Miriam be aware of? 

• Magnesium metal is not very reactive. Miriam should only wear an apron to protect her clothes from spills. 
• The reaction will produce carbon monoxide, a toxic gas. 
• Magnesium is very reactive with oxygen. Miriam should wear goggles, gloves, and an apron. 
• Water will be produced. She will need a beaker to collect the liquid. 

The tendency of an element to react with other elements to produce compounds. 

• Chemical change
• Neutrality
  
• Reactivity
  
• Valence 

Tags

NGSS.HS-PS1-1