Trees are beneficial to the earth because

• they contribute to global warming.
• they put oxygen into the atmosphere.
• they help to take away the ozone layer.
• they put carbon dioxide into the atmosphere.

Which of the following is NOT a benefit of trees?

• they prevent soil erosion.
• they give back carbon dioxide.
• they are important in the water cycle.
• they provide raw materials for many man-made products.

Which of these is NOT a product from trees?

• tin foil
• syrup
• cardboard
• wood

As a log decays, it will

• remove hydrogen from the air
• remove water from the air
• add nutrients to the soil
• add oxygen to the soil

In which order would you place a leaf, owl, woodpecker and ant in a food chain?

• leaf - ant - woodpecker - owl
• owl - woodpecker - ant - leaf
• ant - leaf - woodpecker - owl
• woodpecker - leaf - ant - owl

Which of the following organisms would NOT be considered decomposers?

• fungi
• insects
• lichens
• bacteria

The process by which trees create oxygen is called

• digestion
• respiration
• transpiration
• photosynthesis

This part of the tree protects it from fire, cold, heat and insects.

• sapwood
• inner bark
• cambium
• outer bark

This part of the tree protects supports the tree but is dead.

• sapwood
• heartwood
• cambium
• outer bark

This part of the tree transports nutrients from the leaves down to the roots, if it is damaged the tree will die.

• sapwood
• heartwood
• inner bark
• outer bark