TF26 - Complete the Words (1-5)

Biologists, who commonly study the distribution of plant and animal species in different environments - their biogeography - strive to develop interpretations or explanation of the patterns of species distribution, but these may be incorrect if the effects of human beings are not taken into consideration. In so - - cases, th - - - effects m - - be acci - - - - - -; for exa - - - -, some spe - - - - of r - - were unin - - - - - - - - - - - transported abo - - -ships fr - - Europe to the islands of the South Pacific. In other cases, species distributions may have been deliberately modified by human beings. The Polynesians in the South Pacific intentionally moved the kumara (sweet potato) to islands in that region to provide the population with a new food crop.

some, these, may, accidental, example. species, rat, unintentionally, aboard, from

Variations in the Earth's temperature over time can be explained by changes in the energy absorbed by the Earth from the Sun. The vari - - - - in t - - Earth's sea - - - - occurs bec - - - - the Ear - - is clo - - - - to a - - farthest fr - - the S - - at diff - - - - - times of the year. However, seasonal changes do not noticeably change the overall temperature of the Earth over short periods of time. There can be large changes over longer periods of time, though, and these temperature variations over time have affected the Earth's climate considerably.

variation, the, seasons, because, Earth, closest, and, from, Sun, different

3

3

4

4

5

5