GEC 117 ( Diagnostic Test-Finals)

What is the scale range of nanotechnology?

• 1 to 10 meters

• 1 to 100 nanometers

• 1 to 1000 micrometers

• 1 to 10 picometers

Who is considered the father of nanotechnology for his famous 1959 lecture “There’s Plenty of Room at the Bottom”?

• Albert Einstein

• Isaac Newton

• Richard Feynman

• Niels Bohr

Which of the following best describes nanotechnology?

• The study of stars and planets

• The manipulation of matter at the atomic or molecular scale

• The design of large mechanical machines

• The use of macro-sized tools for construction

Which of the following is a common application of nanotechnology in medicine?

• Wind energy conversion

• Solar cell design

• Targeted drug delivery systems

• Mechanical watchmaking

Why do materials at the nanoscale often have different properties than at the macroscale?

• They are made of different atoms

• Their color changes naturally

• They have a larger surface area to volume ratio

• They absorb more sunlight

What is the main cause of climate change?

• Increase in rainfall

• Natural rotation of the Earth

• Excess greenhouse gases in the atmosphere

• Decrease in ozone layer thickness

Which gas is the largest contributor to global warming?

• Oxygen (O₂)

• Nitrogen (N₂)

• Carbon dioxide (CO₂)

• Helium (He)

Which human activity contributes the most to greenhouse gas emissions?

• Planting trees

• Burning fossil fuels for energy

• Recycling materials

• Using solar panels

Which of the following is a natural cause of climate change?

• Deforestation

• Volcanic eruptions

• Industrial pollution

• Use of plastic

What is the effect of deforestation on climate change?

• It increases the oxygen level in the air

• It helps absorb more carbon dioxide

• It increases carbon dioxide in the atmosphere

• It reduces greenhouse gases