1) Which decade / year did mud house started? a) 8th - 12th Centuries CE b) 3rd - 7th Centuries CE  c) 24th - 28th Century CE d) Both a and b 2) Which decade / year did brick house started? a) Mud bricks :9000 BC b) Fired bricks :3500 BC c) Fired bricks: 6850 BC d) Mud bricks: 7000 BC e) Both b and d 3) Which decade / year did Smart Eco house started? a) 1970s b) 2000s c) 2010 d) 1990 4) Which house is better and comfort? a) Brick house b) Smart Eco house c) Mud house d) None 5) Which is popular nowadays? a) Brick house b) Mud house c) Smart Eco houses d) None

MATH and SCIENCE fair ( Grade 4 )

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