Questions and answers by

Bonia

Questions (80)

Discuss the four cardinal positions of the Earth and explain how each brings changes in seasons by making reference to the
1. 1 answer
2. 234 views
Describe how the interaction between the geosphere and the atmosphere forms part of the Earth complex systemList any four
1. 1 answer
2. 153 views
Analyse the different compositions and structure of the atmosphere by referring to the altitude, composition of the gas and
1. 1 answer
2. 173 views
Outline two benefits of tides to the inhabitants of the coastal regions in South AfricaHow does solar insolation reaches the
1. 1 answer
2. 222 views
Differentiate between greenhouse gas and global warmingDifferentiate between adhesion and perihelion Give five reasons why the
1. 1 answer
2. 229 views
When molten magma flows from the core of the Earth to the crust and cools it forms what1. Organic rocks 2. Sedimentary rocks 3.
1. 1 answer
2. 212 views
How long does it take for the moon to orbit around the Earth1. 24 days 2. 365 1/4 days 3. 27.3 days 4. 24 hours Which feature
1. 1 answer
2. 251 views
Equinox occurs when1.21-22 June 2. 21-22 December 3. 22-23 April 4. 21-22 March and 22-23 September Which among the following
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2. 127 views
The inclination of the Earth exists is at what1. 22 1°/2 2. 23 1°/2 3. 180° 4. 390° Which among the following solar waves'
1. 1 answer
2. 217 views
Plan an investigation that learners should conduct in the form of worksheet. Yhe worksheet should include the following:Apparatu
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2. 182 views
Use 5 steps of the 5E Model to explain how to apply each in tje scenario
1. 1 answer
2. 255 views
Discuss the two possible mechanism (Xylem sap being pushed upwards from the roots or pulled downwards by leaves)by referring to
1. 1 answer
2. 260 views
Give a short overview of transportation of substances in plants
1. 1 answer
2. 277 views
Evaluate the statement " A shift to sporophyte dominance is an adaptation of plants to life on land" by referring to mosses,
1. 1 answer
2. 287 views
Compare Zygomycota, Ascomycota and Bisidiomycota by referring to their reproduction strategies and other 2 key features
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2. 206 views
Match the following words with the descriptions1. Red tide 2. Saccharomyces cerevisiae used in baking and brewing industries
1. 1 answer
2. 274 views
Give one word for each of the following descriptions1.plant hormone(gas) and causes abscission and ripening of fruits 2.positive
1. 1 answer
2. 270 views
Give one weight for each of the following description.1.a plant hormone(gas) and causes abscission and ripening of fruits
1. 1 answer
2. 234 views
Give one word for each of the following descriptions1.A plant hormone(gas) and causes abscission and ripening of fruits 2.
1. 1 answer
2. 212 views
Bacteria from domain arachea differ from bacteria from domain monera based on what1. Cell walls contain peptidoglycan 2. Plasma
1. 1 answer
2. 245 views
Organisms in the domain bacteria and domain archea are all what1. Parasitic 2. Prokaryotic 3. Mutualistic 3. Pathogens
1. 1 answer
2. 274 views
HIV is what1. An emerging virus 2. A bacteriophage 3. A prion 4. A prophage
1. 1 answer
2. 243 views
Lichens are what1. Air pollution sensors 2. Destruct soil 3. Are classified on the basis of colour 4. Are an association between
1. 1 answer
2. 209 views
Lichens1. Are Air pollution sensors 2.destruct soil 3. Are classified on the basis of colour 4. Are an association between
1. 1 answer
2. 202 views
Spores are produces during asexul and sexual reproduction in1. Yeasts 2. Bacteria 3. Fungi 4. Algae
1. 1 answer
2. 264 views
Prokaryotes reproduce by means of1. The lysogenic cycle 2. Fragmentation 3. The lytic cycle 4. Binary fusion
1. 1 answer
2. 218 views
Zoospores are1. Haploid,flagellated spores 2. Thick-walled spores 3. Gamete 4. Diplodocus zygotes
1. 1 answer
2. 210 views
Mycorrhizae1. Are plant parasites 2. Is a mutualistic relationship 3. Is a type of lichen 4. Supply phosphates
1. 1 answer
2. 274 views
A prokaryote that gains organic nutrients from other living organisms is a1.chemoautotroph 2.photoautotroph 3.chemo heterotroph
1. 1 answer
2. 348 views
Choose the correct answerAn algae colony 1.is a close association of different algae 2.is various filaments that occur together
1. 1 answer
2. 286 views
Setting of the jane eyre novel and the moods Jane was feeling
1. 1 answer
2. 192 views
Use Lowry-Brönstes theory to write the balanced equation for the following reaction: HNO3(aq) +OH(aq)><_+_
1. 1 answer
2. 269 views
Write down the formula of the ion responsible for the basic properties of sodium hydroxide
1. 1 answer
2. 176 views
Arrheniues theoryLowry-Brönsted theory
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2. 249 views
What are moles in chemistry
1. 5 answers
2. 150 views
What are moles
1. 1 answer
2. 127 views
The molar mass of hydrated sodium carbonate is found to be 268g the formula of the hydrated sodium carbonate is Na2CO3.xH2OCalcu
1. 7 answers
2. 597 views
Number of chlorine atoms present in the MgCL2 produced which is 5.90
1. 3 answers
2. 204 views
During an experiment 1.5g of magnesium reacts with excess dilute hydrochloric acid to produce hydrogen gas at STP. Calculate the
1. 3 answers
2. 431 views
Name the following covalent bonds1m SiF4 2. N2S3 3. HBr 4. Br2 4. NO
1. 3 answers
2. 224 views
Which one of the following bonds will be the strongest1. Bond between a nitrogen atom and a hydrogen atom 2. Bind between a
1. 1 answer
2. 221 views
For the ammonium ion write down the number of atoms surrounding the central atom and name used to describe the molecular shape
1. 5 answers
2. 228 views
Represent th eformation of an ammonium ion with the aid of Lewis structures
1. 1 answer
2. 155 views
Name th retype of bond formed between an ammonia molecule and a hydrogen ion
1. 1 answer
2. 155 views
For the ammonia molecule write down the number of election pairs surrounding the central atom, number of atoms surrounding
1. 1 answer
2. 209 views
Write down Lewis structure for the ammonia molecule
1. 1 answer
2. 175 views
How many valence electrons does a nitrogen atom have
1. 1 answer
2. 130 views
Name the type of chemical bond formed between a hydrogen and nitrogen atom
1. 1 answer
2. 171 views
Define isotope
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2. 137 views
When you take a block of butter out of the fridge,it is hard. However after 15 minutes at room temperature it is soft enough to
1. 1 answer
2. 216 views
Define sublimation
1. 1 answer
2. 160 views
Use the solubility guidelines below to determine whether a precipitation reaction will occur in the following cases. If so write
1. 3 answers
2. 184 views
2.00L of 0.800M NaNO3 must be prepared froma solution known to be 1.50 in concentration. How many ml are required
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2. 158 views
Determine the grams of solute required to prepare 507 ml of a 2.75M NaF solution
1. 1 answer
2. 218 views
Determine the final volume of the solution if 0.783 grams of Na2CO3 is used to make a 0 348 M solutionShow all calculations
1. 1 answer
2. 245 views
Which of the following represents a neutralization reactionA. Sodium hydroxide + hydrochloric acid> sodium chloride+ water B.
1. 1 answer
2. 295 views
Symbol of lead nitrate
1. 1 answer
2. 162 views
Two colorless liquids, potassium iodine and lead(II) are mixed to form a yellow precipitate. What name of the precipitate can be
1. 1 answer
2. 166 views
What is the corrects bame for NH4CIOA
1. 1 answer
2. 165 views
What is the correct formula for an ionic compound that contains aluminum ions and carbonate ions
1. 1 answer
2. 173 views
Which atom is most likely to form a 3+ ion?A. Li B.Kr C.P D.Sr E.Fe
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2. 161 views
Which atom is most likely to form a 3+ ion
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2. 199 views
A nitride ion has how many electrons
1. 1 answer
2. 167 views
Identify ions present in KHCO3
1. 1 answer
2. 235 views
Whqt is The smallest unit into which a pure substance such as sugar or water can be divided while still retaining its
1. 1 answer
2. 213 views
Analyse the internal structure of the Earth by looking at the thickness,diameter,density and volume and density of lithosphere,
1. 1 answer
2. 200 views
Discuss physical factors affecting mining in South African context
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2. 254 views
Discuss seasons of the Earth
1. 1 answer
2. 131 views
Different spheres of the Earth and their influence on one another
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2. 165 views
Different spheres and their influence on one another
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2. 165 views
Names of spheres and their definitionsTheir influence on one another
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2. 209 views
Types of eclipse
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2. 203 views
10 recourse of help in the community
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2. 155 views
Why do we study Shakespeare
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2. 178 views
Tragedy if macbeth
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2. 158 views
Exaplin the diagram US>CS>RCD>R in terms of classical conditioning
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2. 123 views
Discuss the characteristics of classical instrumental and operant conditioning theories.
1. 1 answer
2. 163 views
Construct a mindnd map that explains information processing theory
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2. 134 views
Discuss with examples stages of development according to Piaget
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2. 167 views
Different types of learning strategies and how they can be employed to meet the diverse needs of learners
1. 1 answer
2. 229 views