Select Page

Subject:

geography

Class:

class VII

Key Concepts

earth crust, core, mantle, rock types, rock cycle, igneous rocks, metamorphic, sedimentary

essential questions

1. Have you ever wondered why we can not reach the center of the Earth?
2. How do you think are the rocks and minerals that we use in everyday life are actually made?
3. What happens deep inside the earth? What is the Earth actually made of?

Remembering:

  1. The continental crust is made of minerals and known as  a) SIMA   b) SIAL  c) NIFE  d) ALSI
  2. Oceanic crust is made of: a) magnesium and silver   b) magnesium and silica   c) Alumina and Magnesium  d) Silica and Alumina
  3. Depth of mantle: a) 3500km  b) 2900Km  c) 3200km
  4. Depth of core from surface of earth: a) approx 4000km  b) approx 3400km  c) 5100km approx
  5. The core of the earth is known as NIFE because: a) nickel and ferrous   b) nickel and feroxide  c) nitrogen and ferrous
  6. Which of the following rock is extrusive igneous rock: a) diamond  b) marble c) agate d) basalt

understanding:

  1. Granite is _____ igneous rock. a) intrusive  b) extrusive  c) sedimentary d) metamorphic
  2. Under heat pressure limestone turns into marble, what does clay change into: a) jasper  b) basalt  c) slate  d) chalcedony
  3. When igneous and sedimentary rocks are subjected to heat and pressure, which type of rocks do they change into? a) Metamorphic   b) intrusive  c) extrusive  d) molten masses

Application:

  1. The crust is the thinnest of all layers of Earth: it is only 5km from the ocean floor. How deep is the crust in the continental land masses? a) Approximately 32Km    b) Approximately 36Km  c) Approx 35Km   d) 10 Km

Analysis:

Evaluation:

Read the following two statements  carefully and choose the correct options:

  1. Statement 1: Crust is the uppermost layer of the earth and is divided into two  parts. Statement 2: One has to travel approximately 2900 km to reach the mantle from the crust.  a) Statement 1 is correct while statement 2 is incorrect.  b) statement 2 is correct while statement 1 is incorrect  c)Both are incorrect d) Both are correct
  2. Statement 1: Main minerals found in crust is silica, aluminium and magnesium. Statement 2: Main minerals found in core is nickel and ferrous. a) Statement 1 is correct while statement 2 is incorrect.  b) statement 2 is correct while statement 1 is incorrect  c)Both are incorrect d) Both are correct
  3. Statement 1: Fossils are remains of dead plants and animals trapped in layers of rocks. Statement 2: If we see a layer of rocks which have fossils in them, then we can conclude it must be a layer of sedimentary rocks. a) Statement 1 is correct while statement 2 is incorrect.  b) statement 2 is correct while statement 1 is incorrect  c)Both are incorrect d) Both are correct
  4. Statement 1: Igneous rocks formed by cooling on the surface of the earth are called intrusive igneous rocks. Statement 2: Granite is an example of Intrusive rock. a) Statement 1 is correct while statement 2 is incorrect.  b) statement 2 is correct while statement 1 is incorrect  c)Both are incorrect d) Both are correct
  5. Statement 1: Igneous rocks are made exclusively of molten magma. Statement 2: Sedimentary and Metamorphic rocks are exclusively made of only igneous rocks. a) Statement 1 is correct while statement 2 is incorrect.  b) statement 2 is correct while statement 1 is incorrect  c)Both are incorrect d) Both are correct

Create: