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The diagram shows a chemical reaction. Which of the following most likely describes the reaction in the diagram?

• The heat created a chemical reaction between the iron and sulfur, creating a compound of iron sulfide with new chemical properties.

• The heat created a physical reaction between the iron and sulfur, creating a mixture with new physical properties.

• The heat evaporated the iron and sulfur, creating a precipitate with new chemical properties.

• The heat melted the iron and sulfur, creating a solution with new physical properties.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Sodium sulfate is a chemical used in developing photos. The composition of sodium sulfate is shown in the table.

What is the chemical formula for sodium sulfate?

• Na₂SO₄

• Na²SO⁴

• 2(NaSO)₄

• 2(NaSO₂)

Tags

NGSS.MS-PS1-1

Which investigation resulted in a chemical change? Select ONE correct answer.

Tags

NGSS.MS-PS1-2

What is the process by which plants convert sunlight into chemical energy?

• Photosynthesis

• Respiration

• Transpiration

• Fermentation

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which of the following elements is a noble gas?

• Oxygen

• Nitrogen

• Helium

• Carbon

What is the chemical formula for water?

Tags

NGSS.MS-PS1-1

Which organelle is known as the powerhouse of the cell?

• Nucleus

• Mitochondria

• Ribosome

• Chloroplast

Tags

NGSS.MS-LS1-2

What is the acceleration due to gravity on Earth?

Which of the following is a chemical change?

• Melting of ice

• Boiling of water

• Rusting of iron

• Breaking of glass

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the main gas found in the Earth's atmosphere?

• Oxygen

• Hydrogen

• Carbon Dioxide

• Nitrogen