Question: Choose your answer.

Lemon juice turns litmus paper red, is corrosive and tastes sour. Lemon juice is classified as

OPTIONS:
- an acid.
- a base.
- an element.
- More information is needed to classify lemon juice.
My Answer: an acid.

Question: Choose your answer.

The length of daylight changes as the seasons change during the year. What causes these changes in daylight?

OPTIONS:
- Earth's tilt on its axis
- the Sun's tilt on its axis
- Earth spinning on its axis
- the Sun spinning on its axis
My Answer: Earth's tilt on its axis

Question: Choose your answer.

The Andes Mountains in South America formed when an oceanic plate shifted beneath a continental plate. Which other landforms are usually associated with this type of plate boundary?

OPTIONS:
- barrier islands
- ocean trenches
- mid-ocean ridges
- volcanic island arcs
My Answer: ocean trenches

Question: Choose your answer.

Diseases that can be transmitted between organisms are

OPTIONS:
- infectious.
- inherited.
- environmental.
- congenital.
My Answer:
infectious.