NGSS Science Review

The table shows the number of neutrons, protons, and electrons for two atoms. How are the two atoms alike?

• They have the same charge.

• They have the same mass number.

• They have the same atomic number

• They are atoms of the same element.

Tags

NGSS.MS-PS1-1

The atoms of a certain element each contain 11 protons and 1 valence electron. Which statement correctly identifies this element and describes its chemical reactivity?

• The element is sodium, and it is highly reactive

• The element is fluorine, and it is highly reactive

• The element is sodium, and it is not very reactive

• The element is fluorine, and it is not very reactive

How many of each atom are in the compound above?

• 1 magnesium atom, 2 iron atoms, and 4 oxygen atoms

• 3 magnesium atoms, 2 iron atoms, and 4 oxygen atoms

• 6 magnesium atoms, 6 iron atoms, and 12 oxygen atoms

• 3 magnesium atoms, 6 iron atoms, and 12 oxygen atoms

Tags

NGSS.MS-PS1-1

Which of the following is the best clue that a chemical reaction has taken place?

• Change in color

• Change in state

• Change in particle size

• Change in volume

Tags

NGSS.MS-PS1-2

How would you use the scientific method to determine the relationship between the mass of an object and its acceleration due to gravity?

• Calculate the force on different masses and measure the acceleration

• Drop objects of different masses from the same height and time their descent

• Increase the mass of an object while keeping the force constant

• Keep the mass constant and vary the force applied

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DOK Level 3: Strategic Thinking

Design an experiment to test the effect of sunlight on the rate of photosynthesis in a plant. What would be your control variable?

• The type of plant used

• The amount of water given to the plant

• The amount of sunlight each plant receives

• The temperature of the environment

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DOK Level 3: Strategic Thinking

Design a model to demonstrate how Earth's systems (geosphere, hydrosphere, atmosphere, and biosphere) interact to affect climate. Explain the role of each system in your model.

• Focus only on the atmosphere and its gases, ignoring interactions with other systems.

• Show how volcanic activity (geosphere) affects atmospheric conditions and influences ocean currents (hydrosphere).

• Model only the biosphere's impact on the atmosphere through carbon dioxide production.

• Isolate the hydrosphere and examine its effects without interaction with other systems.

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DOK Level 3: Strategic Thinking

The diagram shows the arrangement of electrons in a neon atom. How many protons are present in this atom's nucleus?

• 10

• 8

• 2

• There is not enough information to answer this question.

Tags

NGSS.MS-PS1-1

In the diagram, the arrows labeled III point to the atom's ______________.

• Protons

• Neutrons

• Nucleus

• Electrons

Tags

NGSS.MS-PS1-1

Elements with seven valence electrons —

• are highly reactive

• are highly stable

• have a high mass

• have a low mass