Integrated science first month Exam

1.The plant gets rid of water through the stomata, a process known as……………….

• Transpiration

• Breathing

• digestion

• Absorption

Water is a polar compound because:

• Oxygen carries a positive charge, hydrogen carries a negative charge

• The electronegativity of hydrogen is greater than the electronegativity of oxygen

• Oxygen carries a partial positive charge; hydrogen carries a partial negative charge.

• Oxygen carries a partial negative charge; hydrogen carries a partial positive charge.

Four students measured the pH value of four water samples and recorded the value in the table in the designated place:

• A

• B

• C

• D

The solution resulting from dissolving table salt in water is neutral because:

• The salt ions remain in the solution due to their association with water ions.

• The association of all salt ions in the solution with water ions.

• Sodium ions in solution bind to water ions

• The association of chloride ions in solution with water ions

Which of the following salts, when dissolved in water, produces a basic solution?

• Sodium chloride

• ammonium chloride

• Sodium bicarbonate

• ammonium acetate

A continuous change between the three states of water on the Earth’s surface within a closed system called the cycle.

• Nitrogenous

• carbonaceous

• Oxygenation

• Hydrology

What happen if :Acidic rain falls on the rocks ( effect on rocks )

Which of the following processes describes the movement of water from the soil into the roots of a plant?

• Transpiration

• Osmosis

• Evaporation

• Condensation

What is the primary reason that ice floats on water?

• Ice is less dense than liquid water.

• Ice has a higher temperature than liquid water.

• Ice is made of different molecules than water.

• Ice absorbs more heat than liquid water.

Which of the following is a characteristic of acids when dissolved in water?

• They produce hydroxide ions.

• They produce hydrogen ions.

• They have a pH greater than 7.

• They taste bitter.