STAAR Science Review Reporting Category 1

Which statement 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

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

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

• protons and electrons

• neutrons and protons

• neutrons and electrons

• protons and neutrinos

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.

What is the best title for the chart below?

• characteristics of metals in the periodic table

• items that conduct electricity

• highly reactive elements

• organic compounds

The definition of atomic mass is...

• The mass of an atom equal to the number of protons and neutrons

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

• A combination of two or more types of matter

• A positively charged subatomic particle

The definition of chemical change is....

• a pure substance containing only one type of atom

• a collection of orbitals around the nucleus

• a subatomic particle that has almost no mass and a negative charge

• the reaction between substances that results in new substances with different properties

An atom of a certain element has 36 protons, 36 electrons, and a mass number of 84.  At room temperature this element is a very stable gas.  How many neutrons are in this atom?

• 48
• 36
• 84
• 120

What types of particles are found in the cloud surrounding the atom's nucleus?

• Positively charged particles and negatively charged particles.
• Negatively charged particles only
• Neutral particles and positively charged particles
• Positively charged particles only

The horizontal row on the periodic table is called a

• group
• family
• period
• atomic number