science grade 7 - regular & advanced\n47. mushrooms, bread molds, and yeasts are classified together in the…

science grade 7 - regular & advanced\n47. mushrooms, bread molds, and yeasts are classified together in the kingdom fungi. specific characteristics are used to classify these organisms. which of the following is a characteristic used to classify these organisms as fungi?\na. they are unicellular.\nb. they are parasites.\nc. they are prokaryotic.\nd. they are heterotrophs.\n48. the following statements were taken from the procedures of four different investigations.\n|investigation|statement|\n|----|----| \n|1|pour 50 milliliters (ml) of water down four inclined surfaces.| \n|2|roll a marble down the ramp from a height of 10 centimeters (cm), 20 cm, and 30 cm.| \n|3|take the mass of five rocks separately and then determine the average mass in grams (g).| \n|4|conduct four trials of measuring the amount of time a battery lights the bulb in a flashlight.| \nthe statement from which investigation is an example of repetition?\na. investigation 1\nb. investigation 2\nc. investigation 3\nd. investigation 4\n49. emma constructed a simple motor. when connected correctly, the coil of copper wire spins. which of the following best describes the energy transformation that takes place between the paper clips and the spinning coil?\na. chemical energy transforms into electrical energy\nb. mechanical energy transforms into electrical energy\nc. electrical energy transforms into mechanical energy\nd. mechanical energy transforms into chemical energy

science grade 7 - regular & advanced\n47. mushrooms, bread molds, and yeasts are classified together in the kingdom fungi. specific characteristics are used to classify these organisms. which of the following is a characteristic used to classify these organisms as fungi?\na. they are unicellular.\nb. they are parasites.\nc. they are prokaryotic.\nd. they are heterotrophs.\n48. the following statements were taken from the procedures of four different investigations.\n|investigation|statement|\n|----|----| \n|1|pour 50 milliliters (ml) of water down four inclined surfaces.| \n|2|roll a marble down the ramp from a height of 10 centimeters (cm), 20 cm, and 30 cm.| \n|3|take the mass of five rocks separately and then determine the average mass in grams (g).| \n|4|conduct four trials of measuring the amount of time a battery lights the bulb in a flashlight.| \nthe statement from which investigation is an example of repetition?\na. investigation 1\nb. investigation 2\nc. investigation 3\nd. investigation 4\n49. emma constructed a simple motor. when connected correctly, the coil of copper wire spins. which of the following best describes the energy transformation that takes place between the paper clips and the spinning coil?\na. chemical energy transforms into electrical energy\nb. mechanical energy transforms into electrical energy\nc. electrical energy transforms into mechanical energy\nd. mechanical energy transforms into chemical energy

Answer

Brief Explanations:

Question 47:

Fungi are heterotrophic organisms, meaning they obtain nutrients from other organic matter. Not all fungi are parasites, they are eukaryotic (not prokaryotic) and multicellular (except for some yeasts which are unicellular).

Question 48:

Repetition in an experiment involves repeating the same measurement or trial multiple times. Investigation 4 involves conducting four trials of measuring the time a battery - powered bulb in a flashlight lights, which is an example of repetition.

Question 49:

In a simple motor, the battery provides electrical energy. When the current - carrying copper wire coil is in a magnetic field, it experiences a force and starts to spin, which is mechanical energy. So, electrical energy transforms into mechanical energy.

Answer:

  1. D. They are heterotrophs.
  2. D. Investigation 4
  3. C. Electrical energy transforms into mechanical energy