Mode of formation: Chemically formed sedimentary rock are formed when chemical sediments accumulates over a long period of time. These sediments then combine and undergo further processes to form rock. (3b)
(iii) Barite (3c)
(i) They serve as a source of minerals such as halite ie common salt. (ii) They produce limestone used in producing cement. (iii) They houses fossil records. (iv) They help in housing coral reefs which serves as tourist attraction ++++++++++++++++++++++++++++++ (4a)
A lake is an area filled with water, localized in a basin, that is surrounded by land, apart from any river or other outlet that serves to feed or drain the lake.
A lake is also a land-locked body of slow-flowing water. (4b)
WIND EROSION LAKES: These are lakes formed where wind deflation erode and result into formation of depression in desert. If such depressions are small and shallow pan lakes may form. But sometimes such depression goes deeper to expose water table and result into formation of Oasis lakes like in Qattara Depression in Egypt. (4c)
(i) It provides water and food for human use (ii) It helps in water pollination purification to support ecosystems (iii) Serves as tourist center
Draw the diagram of rain gauge (7bi)
Remove the jar’s label.
Attach the ruler to the outside of the jar with the rubber band; make sure that the bottom edge of the ruler is even with the bottom of the jar. Or secure the ruler inside the jar so it is standing vertically with the end at the base of the jar/bottle. Tape the ruler in place so the numbers can be read from the outside of the jar/bottle.
Note: As an alternative to a ruler, you can use a permanent marker to mark the inches/centimeters on clear tape affixed vertically to the outside of the jar/bottle beginning at the base to the outside of the jar/bottle. Cover the marks with a second piece of clear waterproof tape.
Place the funnel in the top of the jar. The top end of the funnel should cover the entire mouth of the jar.
If you would like, you can practice filling the jar with water and measuring the total amount. (7bii) Precautions taken while measuring rainfall… i.e. installing a rainguage are.. It should not be totally inserted inside the ground…and.. IT should be kept away from tress and building to avoid collection of extra water (7c) By summing up all the monthly records for the whole year ++++++++++++++++++++++++++++++ (8a) Food chain is the series of processes by which food is grown or produced, sold,a nd eventually consumed. (8b) Ecosystems maintain themselves by cycling energy and nutrients obtained from external sources. At the first trophic level, primary producers (plants, algae, and some bacteria) use solar energy to produce organic plant material through photosynthesis. Herbivores—animals that feed solely on plants—make up the second trophic level. Predators that eat herbivores comprise the third trophic level; if larger predators are present, they represent still higher trophic levels. Organisms that feed at several trophic levels (for example, grizzly bears that eat berries and salmon) are classified at the highest of the trophic levels at which they feed. Decomposers, which include bacteria, fungi, molds, worms, and insects, break down wastes and dead organisms and return nutrients to the soil. ++++++++++++++++++++++++++++++