Semester-1 Review

Which element is represented by the symbol "O" on the periodic table?

• Oxygen

• Osmium

• Gold

• Silver

Tags

TEKS.SCI.8.6B

In a chemical reaction, if the mass of the reactants is 50 grams, what should be the mass of the products?

• 25 grams

• 50 grams

• 75 grams

• 100 grams

Tags

TEKS.SCI.8.6E

Explain how the conservation of mass is demonstrated in the chemical equation for photosynthesis.

• Mass is lost as energy.

• Mass is gained from sunlight.

• Mass of reactants equals mass of products.

• Mass is converted into oxygen.

Tags

TEKS.SCI.8.6E

Calculate the acceleration of an object with a mass of 10 kg when a net force of 50 N is applied.

• 2 m/s²

• 5 m/s²

• 10 m/s²

• 15 m/s²

Tags

TEKS.SCI.8.7A

A car accelerates at 3 m/s² when a force of 600 N is applied. What is the mass of the car?

• 100 kg

• 150 kg

• 200 kg

• 250 kg

Tags

TEKS.SCI.8.7A

Which of Newton's laws explains why passengers move forward in a car when it suddenly stops?

• First Law

• Second Law

• Third Law

• Law of Gravity

Tags

TEKS.SCI.8.7B

Describe how Newton's Third Law of Motion is demonstrated when a rocket launches.

• The rocket's mass decreases as it burns fuel.

• The rocket pushes against the ground to lift off.

• The rocket's engines push exhaust gases downward, and the gases push the rocket upward.

• The rocket's speed increases as it moves through the atmosphere.

Tags

TEKS.SCI.8.7B

What is the main sequence stage in the life cycle of a star?

• Birth

• Red Giant

• Main Sequence

• White Dwarf

Tags

TEKS.SCI.8.9A

Compare the brightness and temperature of stars using the Hertzsprung-Russell diagram.

• Brightness increases with temperature.

• Brightness decreases with temperature.

• Brightness is unrelated to temperature.

• Brightness is constant regardless of temperature.

Tags

TEKS.SCI.8.9A

Identify the element with atomic number 12 on the periodic table.

• Magnesium

• Aluminum

• Silicon

• Phosphorus

Tags

TEKS.SCI.8.6B