1. SCIENCE REVIEW JAN. 4

2. 1. A delta, the landform found at the mouth of a river, forms when - A. plants on the river bank cause erosion B. the river deposits sediments as it slows C. rushing water makes stones in the river smooth D. water flowing down the mountain makes it taller

3. 2. Which of the following landforms is the result of a river carving out land by erosion? A. Canyon B. Sand dune C. Delta D. Mountain

4. 3.Students used a fan to blow piles of sand. This best models which of the following natural processes that create changes to the land? A. Weathering of rocks to make soil B. Deposition of sediments to form deltas C. Formation and movement of dunes D. Carving out plains creating canyons

5. 4. Which condition is necessary for dunes to be formed? A. Loose, sandy sediments and strong winds B. Frequent rains and abundant plant life C. Strong ocean currents and large boulders D. Volcanic eruptions and earthquakes

6. 5. Canyons and deltas are similar in that both form - A. due to the action of moving water B. high in the tallest mountains C. where lots of sediments collect D. in and around active volcanoes