Grade 9 Science Quiz 4/17

What is the function of the nucleus in a cell?

• It breaks down waste materials within the cell.

• It acts as the storage area for the cell's DNA.

• It is responsible for producing energy for the cell.

• It assists in the synthesis of proteins.

Tags

NGSS.MS-LS1-2

Which of the following is NOT a part of the cell theory?

• All living things are made up of cells.

• Cells are the basic unit of structure and function in living things.

• All cells come from pre-existing cells.

• Cells can only be seen with an electron microscope.

What is the role of the mitochondria in a cell?

• It is involved in the digestion of food particles.

• It stores the cell's hereditary material.

• It is the site of cellular respiration and energy production.

• It synthesizes proteins for the cell.

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-7

In a chemical reaction, what happens to the total mass of the reactants compared to the total mass of the products?

• The total mass of the reactants is always less than the total mass of the products.

• The total mass of the reactants is always greater than the total mass of the products.

• The total mass of the reactants is equal to the total mass of the products.

• The total mass of the reactants and products cannot be compared.

Tags

NGSS.MS-PS1-5

Which organelle is responsible for photosynthesis in plant cells?

• Nucleus

• Mitochondria

• Chloroplast

• Ribosome

Tags

NGSS.MS-LS1-6

What is a product in a chemical reaction?

• A substance that is consumed during the reaction.

• A substance that is present before the reaction starts.

• A substance that is produced by the reaction.

• A catalyst that speeds up the reaction without being consumed.

Tags

NGSS.MS-PS1-5

Which statement best describes an endothermic reaction?

• It releases energy in the form of heat.

• It occurs spontaneously at all temperatures.

• It absorbs energy from the surroundings.

• It only occurs in living organisms.

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NGSS.MS-PS1-4

What is the main function of the cell membrane?

• To control what enters and leaves the cell.

• To store the cell's genetic information.

• To produce proteins for the cell.

• To provide energy for the cell.

Tags

NGSS.MS-LS1-2

In a balanced chemical equation, why must the number of atoms for each element be the same on both sides of the equation?

• To satisfy the law of conservation of mass.

• To ensure that the reaction is exothermic.

• To make the equation easier to read.

• To indicate that the reaction is reversible.

Tags

NGSS.MS-PS1-5

What is the difference between an ionic bond and a covalent bond?

• An ionic bond involves the sharing of electrons, while a covalent bond involves the transfer of electrons.

• An ionic bond involves the transfer of electrons, while a covalent bond involves the sharing of electrons.

• An ionic bond only occurs in organic compounds, while a covalent bond occurs in inorganic compounds.

• An ionic bond produces molecules, while a covalent bond produces crystal lattices.