Y7.A Checkpoint Quiz

Which of these is the best definition for the word ‘organ’?

• part of a plant you can eat

• part of an organism made of one tissue, which has an important job

• a living thing

• part of an organism made of different tissues, which has an important job

Answer explanation

The best definition of 'organ' is 'part of an organism made of different tissues, which has an important job.' This accurately describes how organs function within living beings, unlike the other options.

The seven life processes are...

Answer explanation

The seven life processes are movement, respiration, sensitivity, growth, reproduction, excretion, and nutrition. These processes are essential for the survival and functioning of living organisms.

What is the magnification under a microscope if the objective lens is x10 and the eyepiece is x40?

Mathematical Equivalence

ON

Which of the following are plant organs?

• Root, stem, and leaf

• Flower, fruit, and seed

• Bark, wood, and sap

• Petal, stamen, and pistil

Answer explanation

The correct answer is 'Root, stem, and leaf' as these are the main organs of a plant responsible for growth, support, and photosynthesis. The other options include parts or products of plants but not the primary organs.

What is the total magnification if the eyepiece lens is X5 and the objective lens is X10?

Mathematical Equivalence

ON

Answer explanation

Total magnification is calculated by multiplying the eyepiece magnification by the objective magnification. Here, X5 (eyepiece) x X10 (objective) = X50. Therefore, the correct answer is X50.

What are labels A, B, C, D, E, F, and G on the human body diagram to the right?

• A: Ears, B: Chest, C: Stomach, D: Small Intestine, E: Middle chest, F: Liver, G: Back

• A: Arm, B: Leg, C: Head, D: Chest, E: Back, F: Foot, G: Hand

• A: Brain, B: Lungs, C: Liver, D: Large Intestine, E: Heart, F: Stomach, G: Kidney

• A: Leg, B: Head, C: Chest, D: Arm, E: Foot, F: Back, G: Hand

Answer explanation

The correct labels correspond to internal organs and systems. A: Brain, B: Lungs, C: Liver, D: Large Intestine, E: Heart, F: Stomach, G: Kidney accurately represent these anatomical features.

Write a method for viewing microscope slides.

Success criteria:

● described how to set up a microscope

● described how to see a clearer image down a microscope

● described how to view a more magnified image down a microscope

Answer explanation

To set up a microscope, place the slide on the stage and secure it. Use the lowest power objective for initial focus, then adjust the coarse and fine focus knobs for clarity. Switch to higher power objectives for greater magnification.

Which objective lens is always used at the start of viewing a microscope slide?

• 4x

• 10x

• 40x

• 100x

Answer explanation

The 4x objective lens is always used at the start of viewing a microscope slide because it provides the lowest magnification, allowing for a wider field of view to locate the specimen easily before switching to higher magnifications.

What can be done to view a clearer image down a microscope?

• Adjust the focus knob

• Increase the light intensity

• Change the objective lens

• Clean the eyepiece

Answer explanation

To view a clearer image down a microscope, adjusting the focus knob is essential. This allows you to sharpen the image by bringing the specimen into clearer view, making it the most direct method for improving clarity.

What can be done to view a more magnified image down a microscope?

• Adjust the focus knob

• Change to a higher power objective lens

• Increase the light intensity

• Use a different slide

Answer explanation

To view a more magnified image down a microscope, you should change to a higher power objective lens. This increases the magnification level, allowing for a closer examination of the specimen.