Haslingden High School Science Faculty HOMEWORK - Revision Questions Year 8 Block C

Transcription

1 Haslingden High School Science Faculty HOMEWORK - Revision Questions Year 8 Block C Name: Form: Teacher: Given: Hand in: Comment: Target: Haslingden High School 1

2 Year 8 Block C Homework Booklet Revision Questions! In the week beginning Monday 23 rd June, in Block C Assessment Week, you will be sitting a short test on some of the topics you have studied this year. The questions in this homework booklet will give you an idea of the style of the test, and some of the topics which you will be tested on. Don t forget to ask your class teacher if you want to know any more about the test! As always, you should try to complete all the questions in this booklet. Don t worry if the questions at the end seem a little harder; they re supposed to be! Just do your best and fill in an answer, even if it s a guess, for every question. You CAN use your book to help you and you CAN ask your teacher if you get stuck. Haslingden High School 2

3 1. The drawings show six objects made from different materials. not to scale (a) Fill the gaps in the sentences below. The objects are made from materials that are all types of... All the materials are good conductors of electricity and... (b) From the drawings above give one object that could rust.. (c) The drawing below shows part of an electric cable and a plug. (i) What material could be put around the wires to insulate them? Why is this insulating material needed? Haslingden High School 3

4 (d) Which pair of objects is attracted to a magnet? Tick the correct box. maximum 6 marks Haslingden High School 4

5 2. (a) The diagram below shows a circuit with a two-way switch, S. Rosie puts the switch in the position shown below. S R P Q Complete the table below to show if the bulbs are on or off. Write on or off for each bulb. bulb on or off P Q R (b) Give the name of the part that provides energy for the circuit.... Haslingden High School 5

6 (c) The diagrams below show a light-bulb over a staircase of a model house. There is a two-way switch at the bottom of the stairs and another two-way switch at the top. Under each diagram, tick one box to show if the bulb is on or off. The first one has been done for you. on off on off on off on off 2 marks maximum 4 marks Haslingden High School 6

7 3. Tom tries on four types of footwear in a sports shop. ski boot trainer ice skate walking boot (a) (i) When Tom tries on the footwear, which one sinks into the carpet the most? When Tom tries on the footwear, what is the same for each type of footwear? Tick the correct box. the area of the footwear Tom s weight on the footwear the material of the footwear the weight of the footwear Haslingden High School 7

8 (b) The drawing below shows a snowshoe. snowshoe How do snowshoes help people to walk in deep snow? (c) Choose the correct word from the list to complete the sentence below. air resistance friction gravity magnetism When Tom is ice skating the force of... between the skate and the ice is less than when he is walking on a carpet. Maximum 4 marks Haslingden High School 8

9 4. (a) Over many years, cliffs may be affected by weathering. Describe one effect of weathering on a cliff. (b) The photograph shows a piece of sandstone. (i) The sandstone in the photograph contains a fossil. What is a fossil? What group of rocks does sandstone belong to?... (c) Granite and basalt are igneous rocks. They contain crystals but no fossils. (i) How are igneous rocks formed? Explain why igneous rocks do not contain fossils. Haslingden High School 9

10 (iii) Granite takes much longer to form than basalt. How will the size of the crystals in granite be different from the size of the crystals in basalt? Maximum 6 marks 5. The following are important parts of a balanced diet. carbohydrates proteins fats vitamins water A pupil has a sweet, juicy orange to eat. (a) Complete the following sentences using words from the list above. (i) An orange is a good source of... and marks An orange is a poor source of... and marks (b) Give the names of two parts of a balanced diet which are not shown in the list above marks (c) In order to obtain the nutrients, food must be chewed Give two reasons why it is important to chew food Haslingden High School 10

11 . 2 marks Maximum 8 marks 6. Sailors used to suffer from an illness called scurvy caused by a poor diet on long journeys. James Lind was a doctor who tested treatments for scurvy. He predicted that all acids cure scurvy. I think that all acids will cure scurvy. He gave 6 pairs of sailors with scurvy exactly the same meals but he also gave each pair a different addition to their diet. pair of sailors addition to their diet effect after one week 1 some apple cider beginning to recover 2 25 drops of very dilute sulphuric acid to gargle with* still had scurvy 3 2 teaspoons of vinegar still had scurvy 4 half a pint of sea water* still had scurvy 5 2 oranges and 1 lemon recovered 6 herbs and spices and acidified barley water still had scurvy (a) Does the evidence in the table support the prediction that all acids cure scurvy? Tick the correct box. yes no Use the table to explain your answer. Haslingden High School 11

12 (b) (i) Give the one factor James Lind changed in this experiment. (This is called the independent variable.) Give the factor James Lind examined in this experiment. (This is called the dependent variable.) (c) James Lind s evidence suggested that oranges and lemons cured scurvy. At a later time, other scientists did the following: They separated citric acid from the fruit. They predicted that citric acid would cure scurvy. They tested their prediction by giving pure citric acid as an addition to the diet of sailors with scurvy. They found it did not cure scurvy. The scientists had to make a different prediction. Suggest a new prediction about a cure for scurvy that is consistent with the evidence collected. (d) Explain why it is necessary to investigate the effects of changes in diet over a period of more than one week. Maximum 5 marks Haslingden High School 12

13 7. One evening Jenny and Leah ate chicken sandwiches which had been in their school bags all day. There were harmful bacteria in the food. The next day both girls became very ill. Their doctor gave them antibiotics to take for eight days. The graph represents how antibiotics affect the number of bacteria in the body. number of harmful bacteria in the body time, in days sandwich eaten antibiotics started (a) Use the graph to explain why the girls did not become ill until the day after eating the sandwiches. (b) After taking the antibiotics for eight days Jenny was completely better. Explain why she got better. (c) Leah should have taken the antibiotics for eight days. She felt much better after five days and stopped taking the antibiotics. Two days later she felt very ill again. Use the graph to help you explain why Leah became ill again. 2 marks Haslingden High School 13

14 (d) Food will keep longer if it is placed in a refrigerator at 2 C. Refrigeration does not kill bacteria. What effect does the low temperature have on bacteria? Maximum 5 marks 8. The diagram shows an outline of part of the Periodic Table of Elements. H region 1 region 2 region 3 (a) What is the name of the element with the symbol H?. (b) In which regions of the Periodic Table are the following types of element found? (i) non-metals (such as oxygen and chlorine); region very reactive metals (such as sodium and potassium); region (iii) less reactive metals (such as copper and zinc). Region (c) Why is copper sulphate not found in the Periodic Table?.. Haslingden High School 14

15 (d) An iron nail is placed into some blue copper sulphate solution. A reaction takes place between the iron and the copper sulphate. (i) Complete the word equation for the reaction. iron + copper sulphate + Describe one change you would see on the surface of the nail..... Maximum 7 marks Haslingden High School 15

16 10. (a) In an iron rod the particles vibrate. If one end of an iron rod is heated, the vibrating particles transfer energy to neighbouring particles which are not vibrating so violently. What is this process called? (b). An electric immersion heater is put at the bottom of a large tank of water. The water next to the heater becomes warm. (i) What will happen to the warmed water next to the heater? Give a reason for your answer. 2 marks Why can heat not be transferred in this way in an iron rod? (c) In a liquid, some of the particles have enough kinetic energy to escape from the surface. This process happens even when the liquid is well below its boiling point. (i) What is this process called?. How will this affect the temperature of the liquid left in the container? Maximum 6 marks Haslingden High School 16