LET: Natural Science

Which of the following statements is true?

• liquids are incompressible

• solids are highly compressible

• solids are copressible

• gases are highly compressible

Among the co-founders of the cell theory, who proposed that plants are made of cells?

• Rodulf Virchow

• Theodore Schwann

• Robert Hooke

• Matthias Schleiden

A vector is a quantity with both magnitude and direction. Which of the following is not a vector?

• displacement

• force

• acceleration

• speed

When decomposed chemically, 73 g of a sample of Hal produces 71 g of Cl₂ and 2 g of H₂, while 34 g of H₂ sample produces 32 g of S and 2 g of H_2. This is an example of:

• Law of conservation of mass

• law of multiple proportions

• Law of definite proportions

• Law of thermodynamics

Newton is derived SI unit of force. It is defined to be:

• kg/L

• kg*m/s

• kg*m²

• kg*m/s²

Where does light indepeended reaction in photosynthesis happen?

• thylakoid

• mesophyll

• stroma

• chlorophast

Which of the following's an organelle found in animal cells but not in plant cell?

• centroile

• cell membrane

• chloroplast

• Golgi apparatus

An example of a pure substance that cannot be separated through physical means is ___-

• whiteboard ink

• perfume

• copper wire

• seawater

Which of the following statements about weather is true?

• air moves from an area of low pressure to an area of high pressure

• warm air rises and cold air sinks

• if the air temperature is high, the air pressure is also high

• warm air sinks and cold air rises.

Plants that do not use roots and stems are classified as:

• seedless

• tabular

• non-vascular

• vascular