CBA 1: NATURAL SCIENCE part 1

Which of the following is an important factor in explaining why seasons occur on Earth?

• Earth rotates on its axis
• The sun rotates on its axis
• Earth's axis is tilted
• The sun's axis is tilted

Which of the following is an orderly, systematic approach to problem solving?

• conclusion
• hypothesis
• experiment
• scientific method

What is the correct order for steps in the scientific method?

• gather data, formulate hypothesis, have a question, develop method, draw conclusion
• formulate hypothesis, have a ’question, draw conclusion, gather data, develop method .
• have a question, formulate/hypothesis, develop method, gather data, draw conclusion
• develop method, have a question, formulate hypothesis, draw conclusion, gather data

Which of the following statements in not true of energy in the biosphere?

• Energy flows a one-way path
• Energy is conserved in the biosphere
• Energy follows a cycle through the web of life
• Energy leaves the living system) in the form of heat

A set of chimes made from pipes of different lengths hang as shown: Which of the pipes will give the lowest pitch when struck by a hammer?

• Pipe X
• Pipe Y
• All pipes will give the same note
• You cannot tell without trying

Which of the following technologies serve as alternatives to scalpels and cauterization? i. Lasers ii. Inoculation iii. Ultrasound iv. Radiation

• i and iii
• i, iii, iv
• ii, iii, iv
• ii and iv

Which of the following is an example of a physical change?

• burning metal
• melting of ice
• formation of two gases during electrolysis of water
• formation of a black solid from heated iron and sulfur

Good weather usually prevails in a high-pressure area. This is because the descending air which characterizes a high - pressure area _________________ .

• Cools and increases its capacity to hold water vapor.
• Warms and increases its capacity to hold water vapor.
• Warms and reduces its capacity to hold water vapor.
• Cools and reduces its capacity to hold water vapor.

What type of solar radiation is effectively absorbed by the ozone layer of the earth’s atmosphere?

• infrared
• ultraviolet
• gamma
• x - ray

Which phenomenon is associated with a change in direction of the equatorial currents?

• tsunami
• eutrophication
• unusually high tide
• El Niño